diff --git a/graphicscontext.go b/graphicscontext.go
index c9ebc2539..7ec03fd17 100644
--- a/graphicscontext.go
+++ b/graphicscontext.go
@@ -17,6 +17,8 @@ package ebiten
 import (
 	"math"
 
+	"github.com/hajimehoshi/ebiten/internal/audiobinding"
+	"github.com/hajimehoshi/ebiten/internal/clock"
 	"github.com/hajimehoshi/ebiten/internal/restorable"
 	"github.com/hajimehoshi/ebiten/internal/ui"
 	"github.com/hajimehoshi/ebiten/internal/web"
@@ -95,7 +97,14 @@ func drawWithFittingScale(dst *Image, src *Image) {
 	_ = dst.DrawImage(src, op)
 }
 
-func (c *graphicsContext) Update(updateCount int, afterFrameUpdate func()) error {
+func (c *graphicsContext) Update(afterFrameUpdate func()) error {
+	select {
+	case err := <-audiobinding.Error():
+		return err
+	default:
+	}
+	updateCount := clock.Update()
+
 	if err := c.initializeIfNeeded(); err != nil {
 		return err
 	}
diff --git a/run.go b/run.go
index d1b08368f..307485013 100644
--- a/run.go
+++ b/run.go
@@ -18,7 +18,6 @@ import (
 	"image"
 	"sync/atomic"
 
-	"github.com/hajimehoshi/ebiten/internal/audiobinding"
 	"github.com/hajimehoshi/ebiten/internal/clock"
 	"github.com/hajimehoshi/ebiten/internal/devicescale"
 	"github.com/hajimehoshi/ebiten/internal/ui"
@@ -63,7 +62,7 @@ func IsRunningSlowly() bool {
 var theGraphicsContext atomic.Value
 
 func run(width, height int, scale float64, title string, g *graphicsContext) error {
-	if err := ui.Run(width, height, scale, title, &updater{g}); err != nil {
+	if err := ui.Run(width, height, scale, title, g); err != nil {
 		if _, ok := err.(*ui.RegularTermination); ok {
 			return nil
 		}
@@ -72,31 +71,6 @@ func run(width, height int, scale float64, title string, g *graphicsContext) err
 	return nil
 }
 
-type updater struct {
-	g *graphicsContext
-}
-
-func (u *updater) SetSize(width, height int, scale float64) {
-	u.g.SetSize(width, height, scale)
-}
-
-func (u *updater) Update(afterFrameUpdate func()) error {
-	select {
-	case err := <-audiobinding.Error():
-		return err
-	default:
-	}
-	n := clock.Update()
-	if err := u.g.Update(n, afterFrameUpdate); err != nil {
-		return err
-	}
-	return nil
-}
-
-func (u *updater) Invalidate() {
-	u.g.Invalidate()
-}
-
 // Run runs the game.
 // f is a function which is called at every frame.
 // The argument (*Image) is the render target that represents the screen.