diff --git a/exp/gamepad/gamepad.go b/exp/gamepad/gamepad.go
deleted file mode 100644
index 8f7b7a312..000000000
--- a/exp/gamepad/gamepad.go
+++ /dev/null
@@ -1,123 +0,0 @@
-// Copyright 2015 Hajime Hoshi
-//
-// 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.
-
-// Package gamepad offers abstract gamepad buttons and configuration.
-package gamepad
-
-import (
-	"github.com/hajimehoshi/ebiten"
-)
-
-// A StdButton represents a standard gamepad button.
-// See also: http://www.w3.org/TR/gamepad/
-//    [UL0]            [UR0]
-//    [UL1]            [UR1]
-//
-//    [LU]     [CC]     [RU]
-//  [LL][LR] [CL][CR] [RL][RR]
-//    [LD]              [RD]
-//         [AL]    [AR]
-type StdButton int
-
-const (
-	StdButtonNone StdButton = iota
-	StdButtonLL
-	StdButtonLR
-	StdButtonLU
-	StdButtonLD
-	StdButtonCL
-	StdButtonCC
-	StdButtonCR
-	StdButtonRL
-	StdButtonRR
-	StdButtonRU
-	StdButtonRD
-	StdButtonUL0
-	StdButtonUL1
-	StdButtonUR0
-	StdButtonUR1
-	StdButtonAL
-	StdButtonAR
-)
-
-const threshold = 0.75
-
-type axis struct {
-	id       int
-	positive bool
-}
-
-type Configuration struct {
-	current StdButton
-	buttons map[StdButton]ebiten.GamepadButton
-	axes    map[StdButton]axis
-}
-
-func (c *Configuration) Scan(index int, b StdButton) bool {
-	if c.buttons == nil {
-		c.buttons = map[StdButton]ebiten.GamepadButton{}
-	}
-	if c.axes == nil {
-		c.axes = map[StdButton]axis{}
-	}
-
-	delete(c.buttons, b)
-	delete(c.axes, b)
-
-	ebn := ebiten.GamepadButton(ebiten.GamepadButtonNum(index))
-	for eb := ebiten.GamepadButton(0); eb < ebn; eb++ {
-		if ebiten.IsGamepadButtonPressed(index, eb) {
-			c.buttons[b] = eb
-			return true
-		}
-	}
-	an := ebiten.GamepadAxisNum(index)
-	for a := 0; a < an; a++ {
-		v := ebiten.GamepadAxis(index, an)
-		// Check v <= 1.0 because there is a bug that a button returns an axis value wrongly and the value may be over 1.
-		if threshold <= v && v <= 1.0 {
-			c.axes[b] = axis{a, true}
-			return true
-		}
-		if -1.0 <= v && v <= -threshold {
-			c.axes[b] = axis{a, false}
-			return true
-		}
-	}
-	return false
-}
-
-func (c *Configuration) IsButtonPressed(id int, b StdButton) bool {
-	if c.buttons == nil {
-		c.buttons = map[StdButton]ebiten.GamepadButton{}
-	}
-	if c.axes == nil {
-		c.axes = map[StdButton]axis{}
-	}
-
-	bb, ok := c.buttons[b]
-	if ok {
-		return ebiten.IsGamepadButtonPressed(0, bb)
-	}
-	a, ok := c.axes[b]
-	if ok {
-		v := ebiten.GamepadAxis(0, a.id)
-		if a.positive {
-			return threshold <= v && v <= 1.0
-		} else {
-			return -1.0 <= v && v <= -threshold
-		}
-	}
-	return false
-}