diff --git a/genkeys.go b/genkeys.go
index 5b5330664..12ce74cf9 100644
--- a/genkeys.go
+++ b/genkeys.go
@@ -570,13 +570,13 @@ const (
 )
 `
 
-const uidriverGlfwKeysTmpl = `{{.License}}
+const uiGLFWKeysTmpl = `{{.License}}
 
 {{.DoNotEdit}}
 
 {{.BuildTag}}
 
-package glfw
+package ui
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
@@ -594,13 +594,13 @@ var driverKeyToGLFWKey = map[driver.Key]glfw.Key{
 }
 `
 
-const uidriverJsKeysTmpl = `{{.License}}
+const uiJSKeysTmpl = `{{.License}}
 
 {{.DoNotEdit}}
 
 {{.BuildTag}}
 
-package js
+package ui
 
 import (
 	"syscall/js"
@@ -651,13 +651,13 @@ var androidKeyToDriverKey = map[int]driver.Key{
 }
 `
 
-const uidriverMobileKeysTmpl = `{{.License}}
+const uiMobileKeysTmpl = `{{.License}}
 
 {{.DoNotEdit}}
 
 {{.BuildTag}}
 
-package mobile
+package ui
 
 import (
 	"golang.org/x/mobile/event/key"
@@ -790,9 +790,9 @@ func main() {
 	for path, tmpl := range map[string]string{
 		filepath.Join("internal", "driver", "keys.go"):                 driverKeysTmpl,
 		filepath.Join("internal", "glfw", "keys.go"):                   glfwKeysTmpl,
-		filepath.Join("internal", "uidriver", "glfw", "keys.go"):       uidriverGlfwKeysTmpl,
-		filepath.Join("internal", "uidriver", "mobile", "keys.go"):     uidriverMobileKeysTmpl,
-		filepath.Join("internal", "uidriver", "js", "keys_js.go"):      uidriverJsKeysTmpl,
+		filepath.Join("internal", "ui", "keys_glfw.go"):                uiGLFWKeysTmpl,
+		filepath.Join("internal", "ui", "keys_mobile.go"):              uiMobileKeysTmpl,
+		filepath.Join("internal", "ui", "keys_js.go"):                  uiJSKeysTmpl,
 		filepath.Join("keys.go"):                                       ebitenKeysTmpl,
 		filepath.Join("mobile", "ebitenmobileview", "keys_android.go"): mobileAndroidKeysTmpl,
 	} {
@@ -817,12 +817,13 @@ func main() {
 		case filepath.Join("internal", "glfw", "keys.go"):
 			buildTag = "//go:build !js" +
 				"\n// +build !js"
-		case filepath.Join("internal", "uidriver", "mobile", "keys.go"):
-			buildTag = "//go:build android || ios" +
-				"\n// +build android ios"
-		case filepath.Join("internal", "uidriver", "glfw", "keys.go"):
-			buildTag = "//go:build !android && !js && !ios" +
-				"\n// +build !android,!js,!ios"
+		case filepath.Join("internal", "ui", "keys_mobile.go"):
+			buildTag = "//go:build (android || ios) && !ebitencbackend" +
+				"\n// +build android ios" +
+				"\n// +build !ebitencbackend"
+		case filepath.Join("internal", "ui", "keys_glfw.go"):
+			buildTag = "//go:build !android && !js && !ios && !ebitencbackend" +
+				"\n// +build !android,!js,!ios,!ebitencbackend"
 		}
 		// NOTE: According to godoc, maps are automatically sorted by key.
 		if err := tmpl.Execute(f, struct {
diff --git a/init.go b/init.go
index 3b1d1cb81..3a55254ac 100644
--- a/init.go
+++ b/init.go
@@ -16,8 +16,9 @@ package ebiten
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/graphicscommand"
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 func init() {
-	graphicscommand.SetGraphicsDriver(uiDriver().Graphics())
+	graphicscommand.SetGraphicsDriver(ui.Get().Graphics())
 }
diff --git a/input.go b/input.go
index d37acad20..9d518be78 100644
--- a/input.go
+++ b/input.go
@@ -18,6 +18,7 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
 	"github.com/hajimehoshi/ebiten/v2/internal/gamepad"
 	"github.com/hajimehoshi/ebiten/v2/internal/gamepaddb"
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 // AppendInputChars appends "printable" runes, read from the keyboard at the time update is called, to runes,
@@ -35,7 +36,7 @@ import (
 //
 // Keyboards don't work on iOS yet (#1090).
 func AppendInputChars(runes []rune) []rune {
-	return uiDriver().Input().AppendInputChars(runes)
+	return ui.Get().Input().AppendInputChars(runes)
 }
 
 // InputChars return "printable" runes read from the keyboard at the time update is called.
@@ -82,7 +83,7 @@ func IsKeyPressed(key Key) bool {
 		keys = []driver.Key{driver.Key(key)}
 	}
 	for _, k := range keys {
-		if uiDriver().Input().IsKeyPressed(k) {
+		if ui.Get().Input().IsKeyPressed(k) {
 			return true
 		}
 	}
@@ -98,7 +99,7 @@ func IsKeyPressed(key Key) bool {
 //
 // CursorPosition is concurrent-safe.
 func CursorPosition() (x, y int) {
-	return uiDriver().Input().CursorPosition()
+	return ui.Get().Input().CursorPosition()
 }
 
 // Wheel returns x and y offsets of the mouse wheel or touchpad scroll.
@@ -106,7 +107,7 @@ func CursorPosition() (x, y int) {
 //
 // Wheel is concurrent-safe.
 func Wheel() (xoff, yoff float64) {
-	return uiDriver().Input().Wheel()
+	return ui.Get().Input().Wheel()
 }
 
 // IsMouseButtonPressed returns a boolean indicating whether mouseButton is pressed.
@@ -116,7 +117,7 @@ func Wheel() (xoff, yoff float64) {
 //
 // IsMouseButtonPressed is concurrent-safe.
 func IsMouseButtonPressed(mouseButton MouseButton) bool {
-	return uiDriver().Input().IsMouseButtonPressed(mouseButton)
+	return ui.Get().Input().IsMouseButtonPressed(mouseButton)
 }
 
 // GamepadID represents a gamepad's identifier.
@@ -336,7 +337,7 @@ type TouchID = driver.TouchID
 //
 // AppendTouchIDs is concurrent-safe.
 func AppendTouchIDs(touches []TouchID) []TouchID {
-	return uiDriver().Input().AppendTouchIDs(touches)
+	return ui.Get().Input().AppendTouchIDs(touches)
 }
 
 // TouchIDs returns the current touch states.
@@ -352,5 +353,5 @@ func TouchIDs() []TouchID {
 //
 // TouchPosition is cuncurrent-safe.
 func TouchPosition(id TouchID) (int, int) {
-	return uiDriver().Input().TouchPosition(id)
+	return ui.Get().Input().TouchPosition(id)
 }
diff --git a/internal/uidriver/glfw/graphics_darwin.go b/internal/ui/graphics_darwin.go
similarity index 95%
rename from internal/uidriver/glfw/graphics_darwin.go
rename to internal/ui/graphics_darwin.go
index 925282d72..e082201c6 100644
--- a/internal/uidriver/glfw/graphics_darwin.go
+++ b/internal/ui/graphics_darwin.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !ebitengl && !ios
-// +build !ebitengl,!ios
+//go:build !ios && !ebitengl && !ebitencbackend
+// +build !ios,!ebitengl,!ebitencbackend
 
-package glfw
+package ui
 
 // #cgo CFLAGS: -x objective-c
 // #cgo LDFLAGS: -framework Foundation
diff --git a/internal/uidriver/mobile/graphics_ios.go b/internal/ui/graphics_ios.go
similarity index 90%
rename from internal/uidriver/mobile/graphics_ios.go
rename to internal/ui/graphics_ios.go
index 07a80c3f6..ca40b74fd 100644
--- a/internal/uidriver/mobile/graphics_ios.go
+++ b/internal/ui/graphics_ios.go
@@ -12,11 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ((ios && arm) || (ios && arm64)) && !ebitengl
+//go:build ((ios && arm) || (ios && arm64)) && !ebitengl && !ebitencbackend
 // +build ios,arm ios,arm64
 // +build !ebitengl
+// +build !ebitencbackend
 
-package mobile
+package ui
 
 import (
 	"fmt"
diff --git a/internal/uidriver/mobile/graphics_opengl.go b/internal/ui/graphics_opengl.go
similarity index 85%
rename from internal/uidriver/mobile/graphics_opengl.go
rename to internal/ui/graphics_opengl.go
index d97350f25..662545d2f 100644
--- a/internal/uidriver/mobile/graphics_opengl.go
+++ b/internal/ui/graphics_opengl.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build android || (ios && 386) || (ios && amd64) || (ios && ebitengl)
-// +build android ios,386 ios,amd64 ios,ebitengl
+//go:build !darwin || (ios && 386) || (ios && amd64) || ebitengl
+// +build !darwin ios,386 ios,amd64 ebitengl
 
-package mobile
+package ui
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
diff --git a/internal/uidriver/glfw/hideconsole_notwindows.go b/internal/ui/hideconsole_notwindows.go
similarity index 89%
rename from internal/uidriver/glfw/hideconsole_notwindows.go
rename to internal/ui/hideconsole_notwindows.go
index 60b7bf7b1..ed82e15fc 100644
--- a/internal/uidriver/glfw/hideconsole_notwindows.go
+++ b/internal/ui/hideconsole_notwindows.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !windows || js
-// +build !windows js
+//go:build !windows || ebitencbackend
+// +build !windows ebitencbackend
 
-package glfw
+package ui
 
 // hideConsoleWindowOnWindows does nothing on non-Windows systems.
 func hideConsoleWindowOnWindows() {}
diff --git a/internal/uidriver/glfw/hideconsole_windows.go b/internal/ui/hideconsole_windows.go
similarity index 92%
rename from internal/uidriver/glfw/hideconsole_windows.go
rename to internal/ui/hideconsole_windows.go
index f9e5e0d92..ff4ab8a5d 100644
--- a/internal/uidriver/glfw/hideconsole_windows.go
+++ b/internal/ui/hideconsole_windows.go
@@ -12,7 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package glfw
+//go:build !ebitencbackend
+// +build !ebitencbackend
+
+package ui
 
 import (
 	"fmt"
@@ -39,9 +42,9 @@ func freeConsole() error {
 	r, _, e := procFreeConsoleWindow.Call()
 	if r == 0 {
 		if e != nil && e != windows.ERROR_SUCCESS {
-			return fmt.Errorf("glfw: FreeConsole failed: %w", e)
+			return fmt.Errorf("ui: FreeConsole failed: %w", e)
 		}
-		return fmt.Errorf("glfw: FreeConsole returned 0")
+		return fmt.Errorf("ui: FreeConsole returned 0")
 	}
 	return nil
 }
diff --git a/internal/uidriver/cbackend/input.go b/internal/ui/input_cbackend.go
similarity index 99%
rename from internal/uidriver/cbackend/input.go
rename to internal/ui/input_cbackend.go
index e3405ddd2..3afa657c1 100644
--- a/internal/uidriver/cbackend/input.go
+++ b/internal/ui/input_cbackend.go
@@ -15,7 +15,7 @@
 //go:build ebitencbackend
 // +build ebitencbackend
 
-package cbackend
+package ui
 
 import (
 	"sync"
diff --git a/internal/uidriver/glfw/input.go b/internal/ui/input_glfw.go
similarity index 97%
rename from internal/uidriver/glfw/input.go
rename to internal/ui/input_glfw.go
index 19ea06b89..7c157e361 100644
--- a/internal/uidriver/glfw/input.go
+++ b/internal/ui/input_glfw.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !android && !js && !ios
-// +build !android,!js,!ios
+//go:build !android && !js && !ios && !ebitencbackend
+// +build !android,!js,!ios,!ebitencbackend
 
-package glfw
+package ui
 
 import (
 	"math"
diff --git a/internal/uidriver/js/input_js.go b/internal/ui/input_js.go
similarity index 99%
rename from internal/uidriver/js/input_js.go
rename to internal/ui/input_js.go
index 8587ee03b..13a8408ee 100644
--- a/internal/uidriver/js/input_js.go
+++ b/internal/ui/input_js.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package js
+package ui
 
 import (
 	"syscall/js"
diff --git a/internal/uidriver/mobile/input.go b/internal/ui/input_mobile.go
similarity index 96%
rename from internal/uidriver/mobile/input.go
rename to internal/ui/input_mobile.go
index 115f3682e..19ac75112 100644
--- a/internal/uidriver/mobile/input.go
+++ b/internal/ui/input_mobile.go
@@ -12,10 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build android || ios
+//go:build (android || ios) && !ebitencbackend
 // +build android ios
+// +build !ebitencbackend
 
-package mobile
+package ui
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
diff --git a/internal/uidriver/glfw/keys.go b/internal/ui/keys_glfw.go
similarity index 98%
rename from internal/uidriver/glfw/keys.go
rename to internal/ui/keys_glfw.go
index f24018544..f8e568287 100644
--- a/internal/uidriver/glfw/keys.go
+++ b/internal/ui/keys_glfw.go
@@ -14,10 +14,10 @@
 
 // Code generated by genkeys.go using 'go generate'. DO NOT EDIT.
 
-//go:build !android && !js && !ios
-// +build !android,!js,!ios
+//go:build !android && !js && !ios && !ebitencbackend
+// +build !android,!js,!ios,!ebitencbackend
 
-package glfw
+package ui
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
diff --git a/internal/uidriver/js/keys_js.go b/internal/ui/keys_js.go
similarity index 99%
rename from internal/uidriver/js/keys_js.go
rename to internal/ui/keys_js.go
index 2eb7e90e0..b4c7f9527 100644
--- a/internal/uidriver/js/keys_js.go
+++ b/internal/ui/keys_js.go
@@ -14,7 +14,7 @@
 
 // Code generated by genkeys.go using 'go generate'. DO NOT EDIT.
 
-package js
+package ui
 
 import (
 	"syscall/js"
diff --git a/internal/uidriver/mobile/keys.go b/internal/ui/keys_mobile.go
similarity index 98%
rename from internal/uidriver/mobile/keys.go
rename to internal/ui/keys_mobile.go
index b26e32b4e..d0a3ffced 100644
--- a/internal/uidriver/mobile/keys.go
+++ b/internal/ui/keys_mobile.go
@@ -14,10 +14,11 @@
 
 // Code generated by genkeys.go using 'go generate'. DO NOT EDIT.
 
-//go:build android || ios
+//go:build (android || ios) && !ebitencbackend
 // +build android ios
+// +build !ebitencbackend
 
-package mobile
+package ui
 
 import (
 	"golang.org/x/mobile/event/key"
diff --git a/internal/uidriver/glfw/run_notsinglethread.go b/internal/ui/run_notsinglethread.go
similarity index 93%
rename from internal/uidriver/glfw/run_notsinglethread.go
rename to internal/ui/run_notsinglethread.go
index 5b0b19dbb..e4b7faa62 100644
--- a/internal/uidriver/glfw/run_notsinglethread.go
+++ b/internal/ui/run_notsinglethread.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !ebitensinglethread && !android && !js && !ios
-// +build !ebitensinglethread,!android,!js,!ios
+//go:build !android && !js && !ios && !ebitencbackend && !ebitensinglethread
+// +build !android,!js,!ios,!ebitencbackend,!ebitensinglethread
 
-package glfw
+package ui
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
diff --git a/internal/uidriver/glfw/run_singlethread.go b/internal/ui/run_singlethread.go
similarity index 89%
rename from internal/uidriver/glfw/run_singlethread.go
rename to internal/ui/run_singlethread.go
index 799bd2d02..f866a5f27 100644
--- a/internal/uidriver/glfw/run_singlethread.go
+++ b/internal/ui/run_singlethread.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ebitensinglethread && !android && !js && !ios
-// +build ebitensinglethread,!android,!js,!ios
+//go:build !android && !js && !ios && !ebitencbackend && ebitensinglethread
+// +build !android,!js,!ios,!ebitencbackend,ebitensinglethread
 
-package glfw
+package ui
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
diff --git a/internal/uidriver/cbackend/ui.go b/internal/ui/ui_cbackend.go
similarity index 92%
rename from internal/uidriver/cbackend/ui.go
rename to internal/ui/ui_cbackend.go
index 43cfe4d29..277005047 100644
--- a/internal/uidriver/cbackend/ui.go
+++ b/internal/ui/ui_cbackend.go
@@ -15,7 +15,7 @@
 //go:build ebitencbackend
 // +build ebitencbackend
 
-package cbackend
+package ui
 
 import (
 	"runtime"
@@ -23,7 +23,6 @@ import (
 
 	"github.com/hajimehoshi/ebiten/v2/internal/cbackend"
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
-	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl"
 )
 
 const deviceScaleFactor = 1
@@ -60,7 +59,7 @@ func (u *UserInterface) Run(context driver.UIContext) error {
 }
 
 func (*UserInterface) RunWithoutMainLoop(context driver.UIContext) {
-	panic("cbackend: RunWithoutMainLoop is not implemented")
+	panic("ui: RunWithoutMainLoop is not implemented")
 }
 
 func (*UserInterface) DeviceScaleFactor() float64 {
@@ -136,7 +135,3 @@ func (*UserInterface) Input() driver.Input {
 func (*UserInterface) Window() driver.Window {
 	return nil
 }
-
-func (*UserInterface) Graphics() driver.Graphics {
-	return opengl.Get()
-}
diff --git a/internal/uidriver/glfw/ui_darwin.go b/internal/ui/ui_darwin.go
similarity index 98%
rename from internal/uidriver/glfw/ui_darwin.go
rename to internal/ui/ui_darwin.go
index 7bea30f4e..b5421dae2 100644
--- a/internal/uidriver/glfw/ui_darwin.go
+++ b/internal/ui/ui_darwin.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !ios
-// +build !ios
+//go:build !ios && !ebitencbackend
+// +build !ios,!ebitencbackend
 
-package glfw
+package ui
 
 // #cgo CFLAGS: -x objective-c
 // #cgo LDFLAGS: -framework AppKit
diff --git a/internal/uidriver/glfw/ui.go b/internal/ui/ui_glfw.go
similarity index 98%
rename from internal/uidriver/glfw/ui.go
rename to internal/ui/ui_glfw.go
index 89bef59a1..53b0c8193 100644
--- a/internal/uidriver/glfw/ui.go
+++ b/internal/ui/ui_glfw.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !android && !js && !ios
-// +build !android,!js,!ios
+//go:build !android && !js && !ios && !ebitencbackend
+// +build !android,!js,!ios,!ebitencbackend
 
-package glfw
+package ui
 
 import (
 	"fmt"
@@ -42,7 +42,7 @@ func driverCursorModeToGLFWCursorMode(mode driver.CursorMode) int {
 	case driver.CursorModeCaptured:
 		return glfw.CursorDisabled
 	default:
-		panic(fmt.Sprintf("glfw: invalid driver.CursorMode: %d", mode))
+		panic(fmt.Sprintf("ui: invalid driver.CursorMode: %d", mode))
 	}
 }
 
@@ -178,7 +178,7 @@ func initialize() error {
 	}
 	if w == nil {
 		// This can happen on Windows Remote Desktop (#903).
-		panic("glfw: glfw.CreateWindow must not return nil")
+		panic("ui: glfw.CreateWindow must not return nil")
 	}
 	defer w.Destroy()
 	initializeWindowAfterCreation(w)
@@ -498,7 +498,7 @@ func (u *UserInterface) ScreenSizeInFullscreen() (int, int) {
 // isFullscreen must be called from the main thread.
 func (u *UserInterface) isFullscreen() bool {
 	if !u.isRunning() {
-		panic("glfw: isFullscreen can't be called before the main loop starts")
+		panic("ui: isFullscreen can't be called before the main loop starts")
 	}
 	return u.window.GetMonitor() != nil || u.isNativeFullscreen()
 }
@@ -613,7 +613,7 @@ func (u *UserInterface) CursorMode() driver.CursorMode {
 	case glfw.CursorDisabled:
 		v = driver.CursorModeCaptured
 	default:
-		panic(fmt.Sprintf("glfw: invalid GLFW cursor mode: %d", mode))
+		panic(fmt.Sprintf("ui: invalid GLFW cursor mode: %d", mode))
 	}
 	return v
 }
@@ -676,7 +676,7 @@ func init() {
 }
 
 func (u *UserInterface) RunWithoutMainLoop(context driver.UIContext) {
-	panic("glfw: RunWithoutMainLoop is not implemented")
+	panic("ui: RunWithoutMainLoop is not implemented")
 }
 
 // createWindow creates a GLFW window.
@@ -686,7 +686,7 @@ func (u *UserInterface) RunWithoutMainLoop(context driver.UIContext) {
 // createWindow does not set the position or size so far.
 func (u *UserInterface) createWindow() error {
 	if u.window != nil {
-		panic("glfw: u.window must not exist at createWindow")
+		panic("ui: u.window must not exist at createWindow")
 	}
 
 	// As a start, create a window with temporary size to create OpenGL context thread.
@@ -1288,7 +1288,7 @@ func (u *UserInterface) setWindowSizeInDIPImpl(width, height int, fullscreen boo
 				}
 				if err := u.createWindow(); err != nil {
 					// TODO: This should return an error.
-					panic(fmt.Sprintf("glfw: failed to recreate window: %v", err))
+					panic(fmt.Sprintf("ui: failed to recreate window: %v", err))
 				}
 				// Reset the size limits explicitly.
 				u.updateWindowSizeLimits()
@@ -1396,7 +1396,7 @@ func (u *UserInterface) SetScreenTransparent(transparent bool) {
 		u.setInitScreenTransparent(transparent)
 		return
 	}
-	panic("glfw: SetScreenTransparent can't be called after the main loop starts")
+	panic("ui: SetScreenTransparent can't be called after the main loop starts")
 }
 
 func (u *UserInterface) IsScreenTransparent() bool {
diff --git a/internal/uidriver/js/ui_js.go b/internal/ui/ui_js.go
similarity index 98%
rename from internal/uidriver/js/ui_js.go
rename to internal/ui/ui_js.go
index d59da63f5..ca164c3a3 100644
--- a/internal/uidriver/js/ui_js.go
+++ b/internal/ui/ui_js.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package js
+package ui
 
 import (
 	"syscall/js"
@@ -21,7 +21,6 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/internal/devicescale"
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
 	"github.com/hajimehoshi/ebiten/v2/internal/gamepad"
-	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl"
 	"github.com/hajimehoshi/ebiten/v2/internal/hooks"
 )
 
@@ -198,7 +197,7 @@ func (u *UserInterface) SetCursorMode(mode driver.CursorMode) {
 
 func (u *UserInterface) recoverCursorMode() {
 	if theUI.cursorPrevMode == driver.CursorModeCaptured {
-		panic("js: cursorPrevMode must not be driver.CursorModeCaptured at recoverCursorMode")
+		panic("ui: cursorPrevMode must not be driver.CursorModeCaptured at recoverCursorMode")
 	}
 	u.SetCursorMode(u.cursorPrevMode)
 }
@@ -607,7 +606,7 @@ func (u *UserInterface) Run(context driver.UIContext) error {
 }
 
 func (u *UserInterface) RunWithoutMainLoop(context driver.UIContext) {
-	panic("js: RunWithoutMainLoop is not implemented")
+	panic("ui: RunWithoutMainLoop is not implemented")
 }
 
 func (u *UserInterface) updateScreenSize() {
@@ -626,7 +625,7 @@ func (u *UserInterface) updateScreenSize() {
 
 func (u *UserInterface) SetScreenTransparent(transparent bool) {
 	if u.running {
-		panic("js: SetScreenTransparent can't be called after the main loop starts")
+		panic("ui: SetScreenTransparent can't be called after the main loop starts")
 	}
 
 	bodyStyle := document.Get("body").Get("style")
@@ -669,7 +668,3 @@ func (u *UserInterface) Input() driver.Input {
 func (u *UserInterface) Window() driver.Window {
 	return nil
 }
-
-func (*UserInterface) Graphics() driver.Graphics {
-	return opengl.Get()
-}
diff --git a/internal/uidriver/mobile/ui.go b/internal/ui/ui_mobile.go
similarity index 99%
rename from internal/uidriver/mobile/ui.go
rename to internal/ui/ui_mobile.go
index 4b9886098..78dc36b52 100644
--- a/internal/uidriver/mobile/ui.go
+++ b/internal/ui/ui_mobile.go
@@ -12,10 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build android || ios
+//go:build (android || ios) && !ebitencbackend
 // +build android ios
+// +build !ebitencbackend
 
-package mobile
+package ui
 
 import (
 	"fmt"
diff --git a/internal/uidriver/glfw/ui_unix.go b/internal/ui/ui_unix.go
similarity index 95%
rename from internal/uidriver/glfw/ui_unix.go
rename to internal/ui/ui_unix.go
index 43bc61b29..d9ffac577 100644
--- a/internal/uidriver/glfw/ui_unix.go
+++ b/internal/ui/ui_unix.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !android && !darwin && !js && !windows
-// +build !android,!darwin,!js,!windows
+//go:build !android && !darwin && !js && !windows && !ebitencbackend
+// +build !android,!darwin,!js,!windows,!ebitencbackend
 
-package glfw
+package ui
 
 import (
 	"fmt"
@@ -162,7 +162,7 @@ func (u *UserInterface) isNativeFullscreenAvailable() bool {
 }
 
 func (u *UserInterface) setNativeFullscreen(fullscreen bool) {
-	panic(fmt.Sprintf("glfw: setNativeFullscreen is not implemented in this environment: %s", runtime.GOOS))
+	panic(fmt.Sprintf("ui: setNativeFullscreen is not implemented in this environment: %s", runtime.GOOS))
 }
 
 func (u *UserInterface) adjustViewSize() {
diff --git a/internal/uidriver/glfw/ui_windows.go b/internal/ui/ui_windows.go
similarity index 93%
rename from internal/uidriver/glfw/ui_windows.go
rename to internal/ui/ui_windows.go
index f165547dc..9ea91abed 100644
--- a/internal/uidriver/glfw/ui_windows.go
+++ b/internal/ui/ui_windows.go
@@ -12,7 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package glfw
+//go:build !ebitencbackend
+// +build !ebitencbackend
+
+package ui
 
 import (
 	"fmt"
@@ -57,7 +60,7 @@ func getSystemMetrics(nIndex int) (int32, error) {
 	if r == 0 {
 		// GetLastError doesn't provide an extended information.
 		// See https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getsystemmetrics
-		return 0, fmt.Errorf("glfw: GetSystemMetrics returned 0")
+		return 0, fmt.Errorf("ui: GetSystemMetrics returned 0")
 	}
 	return int32(r), nil
 }
@@ -76,9 +79,9 @@ func getMonitorInfoW(hMonitor uintptr, lpmi *monitorInfo) error {
 	r, _, e := procGetMonitorInfoW.Call(hMonitor, uintptr(unsafe.Pointer(lpmi)))
 	if r == 0 {
 		if e != nil && e != windows.ERROR_SUCCESS {
-			return fmt.Errorf("glfw: GetMonitorInfoW failed: error code: %w", e)
+			return fmt.Errorf("ui: GetMonitorInfoW failed: error code: %w", e)
 		}
-		return fmt.Errorf("glfw: GetMonitorInfoW failed: returned 0")
+		return fmt.Errorf("ui: GetMonitorInfoW failed: returned 0")
 	}
 	return nil
 }
@@ -175,7 +178,7 @@ func (u *UserInterface) isNativeFullscreenAvailable() bool {
 }
 
 func (u *UserInterface) setNativeFullscreen(fullscreen bool) {
-	panic(fmt.Sprintf("glfw: setNativeFullscreen is not implemented in this environment: %s", runtime.GOOS))
+	panic(fmt.Sprintf("ui: setNativeFullscreen is not implemented in this environment: %s", runtime.GOOS))
 }
 
 func (u *UserInterface) adjustViewSize() {
diff --git a/internal/uidriver/mobile/vibrate_android.go b/internal/ui/vibrate_android.go
similarity index 98%
rename from internal/uidriver/mobile/vibrate_android.go
rename to internal/ui/vibrate_android.go
index cea56af2c..797b9cdc8 100644
--- a/internal/uidriver/mobile/vibrate_android.go
+++ b/internal/ui/vibrate_android.go
@@ -12,7 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package mobile
+//go:build !ebitencbackend
+// +build !ebitencbackend
+
+package ui
 
 import (
 	"time"
diff --git a/internal/uidriver/mobile/vibrate_ios.go b/internal/ui/vibrate_ios.go
similarity index 98%
rename from internal/uidriver/mobile/vibrate_ios.go
rename to internal/ui/vibrate_ios.go
index bd3c72d81..ff74768c5 100644
--- a/internal/uidriver/mobile/vibrate_ios.go
+++ b/internal/ui/vibrate_ios.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ios
-// +build ios
+//go:build ios && !ebitencbackend
+// +build ios,!ebitencbackend
 
-package mobile
+package ui
 
 // #cgo CFLAGS: -x objective-c
 // #cgo LDFLAGS: -framework AVFoundation -framework CoreHaptics -framework Foundation
diff --git a/internal/uidriver/glfw/window.go b/internal/ui/window_glfw.go
similarity index 95%
rename from internal/uidriver/glfw/window.go
rename to internal/ui/window_glfw.go
index e90735c93..a73335bce 100644
--- a/internal/uidriver/glfw/window.go
+++ b/internal/ui/window_glfw.go
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !android && !js && !ios
-// +build !android,!js,!ios
+//go:build !android && !js && !ios && !ebitencbackend
+// +build !android,!js,!ios,!ebitencbackend
 
-package glfw
+package ui
 
 import (
 	"image"
@@ -114,7 +114,7 @@ func (w *window) IsMaximized() bool {
 
 func (w *window) Maximize() {
 	if !w.IsResizable() {
-		panic("glfw: a window to maximize must be resizable")
+		panic("ui: a window to maximize must be resizable")
 	}
 	if !w.ui.isRunning() {
 		w.ui.setInitWindowMaximized(true)
@@ -152,7 +152,7 @@ func (w *window) Restore() {
 
 func (w *window) Position() (int, int) {
 	if !w.ui.isRunning() {
-		panic("glfw: WindowPosition can't be called before the main loop starts")
+		panic("ui: WindowPosition can't be called before the main loop starts")
 	}
 	x, y := 0, 0
 	w.ui.t.Call(func() {
diff --git a/internal/uidriver/glfw/graphics_opengl.go b/internal/uidriver/glfw/graphics_opengl.go
deleted file mode 100644
index d5d064ff7..000000000
--- a/internal/uidriver/glfw/graphics_opengl.go
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2018 The Ebiten Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:build !android && (!darwin || ebitengl) && !ios && !js
-// +build !android
-// +build !darwin ebitengl
-// +build !ios
-// +build !js
-
-package glfw
-
-import (
-	"github.com/hajimehoshi/ebiten/v2/internal/driver"
-	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl"
-)
-
-func (*UserInterface) Graphics() driver.Graphics {
-	return opengl.Get()
-}
diff --git a/mobile/ebitenmobileview/input.go b/mobile/ebitenmobileview/input.go
index 8523762c0..50f628f52 100644
--- a/mobile/ebitenmobileview/input.go
+++ b/mobile/ebitenmobileview/input.go
@@ -19,7 +19,7 @@ package ebitenmobileview
 
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
-	"github.com/hajimehoshi/ebiten/v2/internal/uidriver/mobile"
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 type position struct {
@@ -34,18 +34,18 @@ var (
 )
 
 var (
-	touchSlice []mobile.Touch
+	touchSlice []ui.Touch
 )
 
 func updateInput() {
 	touchSlice = touchSlice[:0]
 	for id, position := range touches {
-		touchSlice = append(touchSlice, mobile.Touch{
+		touchSlice = append(touchSlice, ui.Touch{
 			ID: id,
 			X:  position.x,
 			Y:  position.y,
 		})
 	}
 
-	mobile.Get().UpdateInput(keys, runes, touchSlice)
+	ui.Get().UpdateInput(keys, runes, touchSlice)
 }
diff --git a/mobile/ebitenmobileview/mobile.go b/mobile/ebitenmobileview/mobile.go
index 17583e500..bebce6537 100644
--- a/mobile/ebitenmobileview/mobile.go
+++ b/mobile/ebitenmobileview/mobile.go
@@ -33,7 +33,7 @@ import (
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/hajimehoshi/ebiten/v2/internal/devicescale"
 	"github.com/hajimehoshi/ebiten/v2/internal/restorable"
-	"github.com/hajimehoshi/ebiten/v2/internal/uidriver/mobile"
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 var theState state
@@ -59,7 +59,7 @@ func SetGame(game ebiten.Game) {
 }
 
 func Layout(viewWidth, viewHeight float64) {
-	mobile.Get().SetOutsideSize(viewWidth, viewHeight)
+	ui.Get().SetOutsideSize(viewWidth, viewHeight)
 }
 
 func Update() error {
@@ -73,15 +73,15 @@ func Update() error {
 		return nil
 	}
 
-	return mobile.Get().Update()
+	return ui.Get().Update()
 }
 
 func Suspend() error {
-	return mobile.Get().SetForeground(false)
+	return ui.Get().SetForeground(false)
 }
 
 func Resume() error {
-	return mobile.Get().SetForeground(true)
+	return ui.Get().SetForeground(true)
 }
 
 func OnContextLost() {
@@ -98,5 +98,5 @@ type RenderRequester interface {
 }
 
 func SetRenderRequester(renderRequester RenderRequester) {
-	mobile.Get().SetRenderRequester(renderRequester)
+	ui.Get().SetRenderRequester(renderRequester)
 }
diff --git a/run.go b/run.go
index 25603973f..42b614be4 100644
--- a/run.go
+++ b/run.go
@@ -20,6 +20,7 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/internal/clock"
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphicscommand"
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 // Game defines necessary functions for a game.
@@ -160,7 +161,7 @@ func RunGame(game Game) error {
 	theUIContext.set(&imageDumperGame{
 		game: game,
 	})
-	if err := uiDriver().Run(theUIContext); err != nil {
+	if err := ui.Get().Run(theUIContext); err != nil {
 		if err == driver.RegularTermination {
 			return nil
 		}
@@ -194,7 +195,7 @@ func isRunGameEnded() bool {
 // ScreenSizeInFullscreen must be called on the main thread before ebiten.Run, and is concurrent-safe after
 // ebiten.Run.
 func ScreenSizeInFullscreen() (int, int) {
-	return uiDriver().ScreenSizeInFullscreen()
+	return ui.Get().ScreenSizeInFullscreen()
 }
 
 // CursorMode returns the current cursor mode.
@@ -203,7 +204,7 @@ func ScreenSizeInFullscreen() (int, int) {
 //
 // CursorMode is concurrent-safe.
 func CursorMode() CursorModeType {
-	return uiDriver().CursorMode()
+	return ui.Get().CursorMode()
 }
 
 // SetCursorMode sets the render and capture mode of the mouse cursor.
@@ -219,7 +220,7 @@ func CursorMode() CursorModeType {
 //
 // SetCursorMode is concurrent-safe.
 func SetCursorMode(mode CursorModeType) {
-	uiDriver().SetCursorMode(mode)
+	ui.Get().SetCursorMode(mode)
 }
 
 // CursorShape returns the current cursor shape.
@@ -228,14 +229,14 @@ func SetCursorMode(mode CursorModeType) {
 //
 // CursorShape is concurrent-safe.
 func CursorShape() CursorShapeType {
-	return uiDriver().CursorShape()
+	return ui.Get().CursorShape()
 }
 
 // SetCursorShape sets the cursor shape.
 //
 // SetCursorShape is concurrent-safe.
 func SetCursorShape(shape CursorShapeType) {
-	uiDriver().SetCursorShape(shape)
+	ui.Get().SetCursorShape(shape)
 }
 
 // IsFullscreen reports whether the current mode is fullscreen or not.
@@ -244,7 +245,7 @@ func SetCursorShape(shape CursorShapeType) {
 //
 // IsFullscreen is concurrent-safe.
 func IsFullscreen() bool {
-	return uiDriver().IsFullscreen()
+	return ui.Get().IsFullscreen()
 }
 
 // SetFullscreen changes the current mode to fullscreen or not on desktops and browsers.
@@ -265,7 +266,7 @@ func IsFullscreen() bool {
 //
 // SetFullscreen is concurrent-safe.
 func SetFullscreen(fullscreen bool) {
-	uiDriver().SetFullscreen(fullscreen)
+	ui.Get().SetFullscreen(fullscreen)
 }
 
 // IsFocused returns a boolean value indicating whether
@@ -275,7 +276,7 @@ func SetFullscreen(fullscreen bool) {
 //
 // IsFocused is concurrent-safe.
 func IsFocused() bool {
-	return uiDriver().IsFocused()
+	return ui.Get().IsFocused()
 }
 
 // IsRunnableOnUnfocused returns a boolean value indicating whether
@@ -283,7 +284,7 @@ func IsFocused() bool {
 //
 // IsRunnableOnUnfocused is concurrent-safe.
 func IsRunnableOnUnfocused() bool {
-	return uiDriver().IsRunnableOnUnfocused()
+	return ui.Get().IsRunnableOnUnfocused()
 }
 
 // SetRunnableOnUnfocused sets the state if the game runs even in background.
@@ -298,7 +299,7 @@ func IsRunnableOnUnfocused() bool {
 //
 // SetRunnableOnUnfocused is concurrent-safe.
 func SetRunnableOnUnfocused(runnableOnUnfocused bool) {
-	uiDriver().SetRunnableOnUnfocused(runnableOnUnfocused)
+	ui.Get().SetRunnableOnUnfocused(runnableOnUnfocused)
 }
 
 // DeviceScaleFactor returns a device scale factor value of the current monitor which the window belongs to.
@@ -316,7 +317,7 @@ func SetRunnableOnUnfocused(runnableOnUnfocused bool) {
 //
 // BUG: DeviceScaleFactor value is not affected by SetWindowPosition before RunGame (#1575).
 func DeviceScaleFactor() float64 {
-	return uiDriver().DeviceScaleFactor()
+	return ui.Get().DeviceScaleFactor()
 }
 
 // IsVsyncEnabled returns a boolean value indicating whether
@@ -324,7 +325,7 @@ func DeviceScaleFactor() float64 {
 //
 // Deprecated: as of v2.2. Use FPSMode instead.
 func IsVsyncEnabled() bool {
-	return uiDriver().FPSMode() == driver.FPSModeVsyncOn
+	return ui.Get().FPSMode() == driver.FPSModeVsyncOn
 }
 
 // SetVsyncEnabled sets a boolean value indicating whether
@@ -333,9 +334,9 @@ func IsVsyncEnabled() bool {
 // Deprecated: as of v2.2. Use SetFPSMode instead.
 func SetVsyncEnabled(enabled bool) {
 	if enabled {
-		uiDriver().SetFPSMode(driver.FPSModeVsyncOn)
+		ui.Get().SetFPSMode(driver.FPSModeVsyncOn)
 	} else {
-		uiDriver().SetFPSMode(driver.FPSModeVsyncOffMaximum)
+		ui.Get().SetFPSMode(driver.FPSModeVsyncOffMaximum)
 	}
 }
 
@@ -371,7 +372,7 @@ const (
 //
 // FPSMode is concurrent-safe.
 func FPSMode() FPSModeType {
-	return uiDriver().FPSMode()
+	return ui.Get().FPSMode()
 }
 
 // SetFPSMode sets the FPS mode.
@@ -379,14 +380,14 @@ func FPSMode() FPSModeType {
 //
 // SetFPSMode is concurrent-safe.
 func SetFPSMode(mode FPSModeType) {
-	uiDriver().SetFPSMode(mode)
+	ui.Get().SetFPSMode(mode)
 }
 
 // ScheduleFrame schedules a next frame when the current FPS mode is FPSModeVsyncOffMinimum.
 //
 // ScheduleFrame is concurrent-safe.
 func ScheduleFrame() {
-	uiDriver().ScheduleFrame()
+	ui.Get().ScheduleFrame()
 }
 
 // MaxTPS returns the current maximum TPS.
@@ -436,7 +437,7 @@ func SetMaxTPS(tps int) {
 //
 // IsScreenTransparent is concurrent-safe.
 func IsScreenTransparent() bool {
-	return uiDriver().IsScreenTransparent()
+	return ui.Get().IsScreenTransparent()
 }
 
 // SetScreenTransparent sets the state if the window is transparent.
@@ -447,7 +448,7 @@ func IsScreenTransparent() bool {
 //
 // SetScreenTransparent is concurrent-safe.
 func SetScreenTransparent(transparent bool) {
-	uiDriver().SetScreenTransparent(transparent)
+	ui.Get().SetScreenTransparent(transparent)
 }
 
 // SetInitFocused sets whether the application is focused on show.
@@ -461,5 +462,5 @@ func SetScreenTransparent(transparent bool) {
 //
 // SetInitFocused is cuncurrent-safe.
 func SetInitFocused(focused bool) {
-	uiDriver().SetInitFocused(focused)
+	ui.Get().SetInitFocused(focused)
 }
diff --git a/run_mobile.go b/run_mobile.go
index 344e73e5b..841aa0ef7 100644
--- a/run_mobile.go
+++ b/run_mobile.go
@@ -17,6 +17,10 @@
 
 package ebiten
 
+import (
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
+)
+
 // RunGameWithoutMainLoop runs the game, but doesn't call the loop on the main (UI) thread.
 // RunGameWithoutMainLoop returns immediately unlike Run.
 //
@@ -26,5 +30,5 @@ package ebiten
 // TODO: Remove this. In order to remove this, the uiContext should be in another package.
 func RunGameWithoutMainLoop(game Game) {
 	theUIContext.set(game)
-	uiDriver().RunWithoutMainLoop(theUIContext)
+	ui.Get().RunWithoutMainLoop(theUIContext)
 }
diff --git a/uicontext.go b/uicontext.go
index 859b541fa..4525cacfd 100644
--- a/uicontext.go
+++ b/uicontext.go
@@ -26,6 +26,7 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphics"
 	"github.com/hajimehoshi/ebiten/v2/internal/hooks"
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 type uiContext struct {
@@ -66,7 +67,7 @@ func (c *uiContext) Layout(outsideWidth, outsideHeight float64) {
 }
 
 func (c *uiContext) updateOffscreen() {
-	d := uiDriver().DeviceScaleFactor()
+	d := ui.Get().DeviceScaleFactor()
 	sw, sh := int(c.outsideWidth*d), int(c.outsideHeight*d)
 
 	ow, oh := c.game.Layout(int(c.outsideWidth), int(c.outsideHeight))
@@ -188,7 +189,7 @@ func (c *uiContext) updateFrameImpl(updateCount int) error {
 		if err := c.game.Update(); err != nil {
 			return err
 		}
-		uiDriver().ResetForFrame()
+		ui.Get().ResetForFrame()
 	}
 
 	// Even though updateCount == 0, the offscreen is cleared and Draw is called.
@@ -199,15 +200,15 @@ func (c *uiContext) updateFrameImpl(updateCount int) error {
 	}
 	c.game.Draw(c.offscreen)
 
-	if uiDriver().Graphics().NeedsClearingScreen() {
+	if ui.Get().Graphics().NeedsClearingScreen() {
 		// This clear is needed for fullscreen mode or some mobile platforms (#622).
 		c.screen.Clear()
 	}
 
 	op := &DrawImageOptions{}
 
-	s := c.screenScale(uiDriver().DeviceScaleFactor())
-	switch vd := uiDriver().Graphics().FramebufferYDirection(); vd {
+	s := c.screenScale(ui.Get().DeviceScaleFactor())
+	switch vd := ui.Get().Graphics().FramebufferYDirection(); vd {
 	case driver.Upward:
 		op.GeoM.Scale(s, -s)
 		_, h := c.offscreen.Size()
@@ -218,7 +219,7 @@ func (c *uiContext) updateFrameImpl(updateCount int) error {
 		panic(fmt.Sprintf("ebiten: invalid v-direction: %d", vd))
 	}
 
-	op.GeoM.Translate(c.offsets(uiDriver().DeviceScaleFactor()))
+	op.GeoM.Translate(c.offsets(ui.Get().DeviceScaleFactor()))
 	op.CompositeMode = CompositeModeCopy
 
 	// filterScreen works with >=1 scale, but does not well with <1 scale.
diff --git a/uidriver_cbackend.go b/uidriver_cbackend.go
deleted file mode 100644
index 333afda14..000000000
--- a/uidriver_cbackend.go
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2021 The Ebiten Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:build ebitencbackend
-// +build ebitencbackend
-
-package ebiten
-
-import (
-	"github.com/hajimehoshi/ebiten/v2/internal/driver"
-	"github.com/hajimehoshi/ebiten/v2/internal/uidriver/cbackend"
-)
-
-func uiDriver() driver.UI {
-	return cbackend.Get()
-}
diff --git a/uidriver_glfw.go b/uidriver_glfw.go
deleted file mode 100644
index ed6006881..000000000
--- a/uidriver_glfw.go
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2019 The Ebiten Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:build !android && !js && !ios && !ebitencbackend
-// +build !android,!js,!ios,!ebitencbackend
-
-package ebiten
-
-import (
-	"github.com/hajimehoshi/ebiten/v2/internal/driver"
-	"github.com/hajimehoshi/ebiten/v2/internal/uidriver/glfw"
-)
-
-func uiDriver() driver.UI {
-	return glfw.Get()
-}
diff --git a/uidriver_js.go b/uidriver_js.go
deleted file mode 100644
index fdefd7130..000000000
--- a/uidriver_js.go
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2019 The Ebiten Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:build !ebitencbackend
-// +build !ebitencbackend
-
-package ebiten
-
-import (
-	"github.com/hajimehoshi/ebiten/v2/internal/driver"
-	"github.com/hajimehoshi/ebiten/v2/internal/uidriver/js"
-)
-
-func uiDriver() driver.UI {
-	return js.Get()
-}
diff --git a/uidriver_mobile.go b/uidriver_mobile.go
deleted file mode 100644
index d864784c3..000000000
--- a/uidriver_mobile.go
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2019 The Ebiten Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:build (android || ios) && !ebitencbackend
-// +build android ios
-// +build !ebitencbackend
-
-package ebiten
-
-import (
-	"github.com/hajimehoshi/ebiten/v2/internal/driver"
-	"github.com/hajimehoshi/ebiten/v2/internal/uidriver/mobile"
-)
-
-func uiDriver() driver.UI {
-	return mobile.Get()
-}
diff --git a/vibrate.go b/vibrate.go
index cb9723d8b..b5256d421 100644
--- a/vibrate.go
+++ b/vibrate.go
@@ -18,6 +18,7 @@ import (
 	"time"
 
 	"github.com/hajimehoshi/ebiten/v2/internal/gamepad"
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 // VibrateOptions represents the options for device vibration.
@@ -50,7 +51,7 @@ type VibrateOptions struct {
 //
 // Vibrate is concurrent-safe.
 func Vibrate(options *VibrateOptions) {
-	uiDriver().Vibrate(options.Duration, options.Magnitude)
+	ui.Get().Vibrate(options.Duration, options.Magnitude)
 }
 
 // VibrateGamepadOptions represents the options for gamepad vibration.
diff --git a/window.go b/window.go
index 505db37ed..c98e4c018 100644
--- a/window.go
+++ b/window.go
@@ -17,6 +17,8 @@ package ebiten
 import (
 	"image"
 	"sync/atomic"
+
+	"github.com/hajimehoshi/ebiten/v2/internal/ui"
 )
 
 const (
@@ -29,7 +31,7 @@ const (
 //
 // IsWindowDecorated is concurrent-safe.
 func IsWindowDecorated() bool {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.IsDecorated()
 	}
 	return false
@@ -47,7 +49,7 @@ func IsWindowDecorated() bool {
 //
 // SetWindowDecorated is concurrent-safe.
 func SetWindowDecorated(decorated bool) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetDecorated(decorated)
 	}
 }
@@ -57,7 +59,7 @@ func SetWindowDecorated(decorated bool) {
 //
 // IsWindowResizable is concurrent-safe.
 func IsWindowResizable() bool {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.IsResizable()
 	}
 	return false
@@ -75,7 +77,7 @@ func IsWindowResizable() bool {
 //
 // SetWindowResizable is concurrent-safe.
 func SetWindowResizable(resizable bool) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetResizable(resizable)
 	}
 }
@@ -86,7 +88,7 @@ func SetWindowResizable(resizable bool) {
 //
 // SetWindowTitle is concurrent-safe.
 func SetWindowTitle(title string) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetTitle(title)
 	}
 }
@@ -112,7 +114,7 @@ func SetWindowTitle(title string) {
 //
 // SetWindowIcon is concurrent-safe.
 func SetWindowIcon(iconImages []image.Image) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetIcon(iconImages)
 	}
 }
@@ -129,7 +131,7 @@ func SetWindowIcon(iconImages []image.Image) {
 //
 // WindowPosition is concurrent-safe.
 func WindowPosition() (x, y int) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.Position()
 	}
 	return 0, 0
@@ -146,7 +148,7 @@ func WindowPosition() (x, y int) {
 // SetWindowPosition is concurrent-safe.
 func SetWindowPosition(x, y int) {
 	atomic.StoreUint32(&windowPositionSetExplicitly, 1)
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetPosition(x, y)
 	}
 }
@@ -156,13 +158,13 @@ var (
 )
 
 func initializeWindowPositionIfNeeded(width, height int) {
-	w := uiDriver().Window()
+	w := ui.Get().Window()
 	if w == nil {
 		return
 	}
 
 	if atomic.LoadUint32(&windowPositionSetExplicitly) == 0 {
-		sw, sh := uiDriver().ScreenSizeInFullscreen()
+		sw, sh := ui.Get().ScreenSizeInFullscreen()
 		x := (sw - width) / 2
 		y := (sh - height) / 3
 		w.SetPosition(x, y)
@@ -176,7 +178,7 @@ func initializeWindowPositionIfNeeded(width, height int) {
 //
 // WindowSize is concurrent-safe.
 func WindowSize() (int, int) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.Size()
 	}
 	return 0, 0
@@ -194,7 +196,7 @@ func SetWindowSize(width, height int) {
 	if width <= 0 || height <= 0 {
 		panic("ebiten: width and height must be positive")
 	}
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetSize(width, height)
 	}
 }
@@ -204,7 +206,7 @@ func SetWindowSize(width, height int) {
 //
 // WindowSizeLimits is concurrent-safe.
 func WindowSizeLimits() (minw, minh, maxw, maxh int) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.SizeLimits()
 	}
 	return -1, -1, -1, -1
@@ -215,7 +217,7 @@ func WindowSizeLimits() (minw, minh, maxw, maxh int) {
 //
 // SetWindowSizeLimits is concurrent-safe.
 func SetWindowSizeLimits(minw, minh, maxw, maxh int) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetSizeLimits(minw, minh, maxw, maxh)
 	}
 }
@@ -226,7 +228,7 @@ func SetWindowSizeLimits(minw, minh, maxw, maxh int) {
 //
 // IsWindowFloating is concurrent-safe.
 func IsWindowFloating() bool {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.IsFloating()
 	}
 	return false
@@ -241,7 +243,7 @@ func IsWindowFloating() bool {
 //
 // SetWindowFloating is concurrent-safe.
 func SetWindowFloating(float bool) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetFloating(float)
 	}
 }
@@ -257,7 +259,7 @@ func MaximizeWindow() {
 	if !IsWindowResizable() {
 		panic("ebiten: a window to maximize must be resizable")
 	}
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.Maximize()
 	}
 }
@@ -273,7 +275,7 @@ func IsWindowMaximized() bool {
 	if !IsWindowResizable() {
 		return false
 	}
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.IsMaximized()
 	}
 	return false
@@ -287,7 +289,7 @@ func IsWindowMaximized() bool {
 //
 // MinimizeWindow is concurrent-safe.
 func MinimizeWindow() {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.Minimize()
 	}
 }
@@ -298,7 +300,7 @@ func MinimizeWindow() {
 //
 // IsWindowMinimized is concurrent-safe.
 func IsWindowMinimized() bool {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.IsMinimized()
 	}
 	return false
@@ -313,7 +315,7 @@ func RestoreWindow() {
 	if !IsWindowMaximized() && !IsWindowMinimized() {
 		panic("ebiten: RestoreWindow must be called on a maximized or a minimized window")
 	}
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.Restore()
 	}
 }
@@ -326,7 +328,7 @@ func RestoreWindow() {
 //
 // IsWindowBeingClosed is concurrent-safe.
 func IsWindowBeingClosed() bool {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.IsBeingClosed()
 	}
 	return false
@@ -344,7 +346,7 @@ func IsWindowBeingClosed() bool {
 //
 // SetWindowClosingHandled is concurrent-safe.
 func SetWindowClosingHandled(handled bool) {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		w.SetClosingHandled(handled)
 	}
 }
@@ -355,7 +357,7 @@ func SetWindowClosingHandled(handled bool) {
 //
 // IsWindowClosingHandled is concurrent-safe.
 func IsWindowClosingHandled() bool {
-	if w := uiDriver().Window(); w != nil {
+	if w := ui.Get().Window(); w != nil {
 		return w.IsClosingHandled()
 	}
 	return false