diff --git a/examples/audio/main.go b/examples/audio/main.go
index 216637994..310f596f2 100644
--- a/examples/audio/main.go
+++ b/examples/audio/main.go
@@ -39,8 +39,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 
 	sampleRate = 22050
 )
@@ -81,7 +81,7 @@ type Player struct {
 }
 
 func playerBarRect() (x, y, w, h int) {
-	w, h = 300, 4
+	w, h = 600, 8
 	x = (screenWidth - w) / 2
 	y = screenHeight - h - 16
 	return
@@ -239,7 +239,7 @@ func (p *Player) draw(screen *ebiten.Image) {
 
 	// Draw the cursor on the bar.
 	c := p.current
-	cw, ch := 4, 10
+	cw, ch := 8, 20
 	cx := int(time.Duration(w)*c/p.total) + x - cw/2
 	cy := y - (ch-h)/2
 	ebitenutil.DrawRect(screen, float64(cx), float64(cy), float64(cw), float64(ch), playerCurrentColor)
@@ -335,7 +335,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Audio (Ebiten Demo)")
 	g, err := NewGame()
 	if err != nil {
diff --git a/examples/audioinfiniteloop/main.go b/examples/audioinfiniteloop/main.go
index 868ab8937..1a9c2de24 100644
--- a/examples/audioinfiniteloop/main.go
+++ b/examples/audioinfiniteloop/main.go
@@ -30,8 +30,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 	sampleRate   = 22050
 
 	introLengthInSecond = 5
@@ -90,7 +90,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Audio Infinite Loop (Ebiten Demo)")
 	if err := ebiten.RunGame(&Game{}); err != nil {
 		log.Fatal(err)
diff --git a/examples/audiopanning/main.go b/examples/audiopanning/main.go
index 90f8ded33..0f0457635 100644
--- a/examples/audiopanning/main.go
+++ b/examples/audiopanning/main.go
@@ -35,8 +35,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 	sampleRate   = 22050
 )
 
@@ -135,7 +135,7 @@ func main() {
 	}
 	img = ebiten.NewImageFromImage(rawimg)
 
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Audio Panning Loop (Ebiten Demo)")
 	g := &Game{}
 	if err := ebiten.RunGame(g); err != nil {
diff --git a/examples/camera/main.go b/examples/camera/main.go
index aa6a26214..6f4bf9412 100644
--- a/examples/camera/main.go
+++ b/examples/camera/main.go
@@ -32,8 +32,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 )
 
 const (
@@ -263,7 +263,7 @@ func main() {
 	}
 	g.world = ebiten.NewImage(worldWidth, worldHeight)
 
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Tiles (Ebiten Demo)")
 	if err := ebiten.RunGame(g); err != nil {
 		log.Fatal(err)
diff --git a/examples/drag/main.go b/examples/drag/main.go
index 5a001e254..b79757adc 100644
--- a/examples/drag/main.go
+++ b/examples/drag/main.go
@@ -36,8 +36,8 @@ func init() {
 }
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 )
 
 // Sprite represents an image.
@@ -316,7 +316,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Drag & Drop (Ebiten Demo)")
 	if err := ebiten.RunGame(NewGame()); err != nil {
 		log.Fatal(err)
diff --git a/examples/paint/main.go b/examples/paint/main.go
index 297117bf7..023b73b50 100644
--- a/examples/paint/main.go
+++ b/examples/paint/main.go
@@ -28,8 +28,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 )
 
 var (
@@ -113,7 +113,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Paint (Ebiten Demo)")
 	if err := ebiten.RunGame(&Game{}); err != nil {
 		log.Fatal(err)
diff --git a/examples/pcm/main.go b/examples/pcm/main.go
index 2cb03da33..6b22a8dda 100644
--- a/examples/pcm/main.go
+++ b/examples/pcm/main.go
@@ -27,8 +27,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 	sampleRate   = 44100
 )
 
@@ -158,7 +158,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("PCM (Ebiten Demo)")
 	if err := ebiten.RunGame(&Game{}); err != nil {
 		log.Fatal(err)
diff --git a/examples/perspective/main.go b/examples/perspective/main.go
index def2aa5a6..4d2b9c3ef 100644
--- a/examples/perspective/main.go
+++ b/examples/perspective/main.go
@@ -27,8 +27,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 )
 
 var (
@@ -84,7 +84,7 @@ func main() {
 	}
 	gophersImage = ebiten.NewImageFromImage(img)
 
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Perspective (Ebiten Demo)")
 	if err := ebiten.RunGame(&Game{}); err != nil {
 		log.Fatal(err)
diff --git a/examples/sinewave/main.go b/examples/sinewave/main.go
index b0a75b237..08db97893 100644
--- a/examples/sinewave/main.go
+++ b/examples/sinewave/main.go
@@ -27,8 +27,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 	sampleRate   = 44100
 	frequency    = 440
 )
@@ -113,7 +113,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Sine Wave (Ebiten Demo)")
 	if err := ebiten.RunGame(&Game{}); err != nil {
 		log.Fatal(err)
diff --git a/examples/typewriter/main.go b/examples/typewriter/main.go
index 55e7e20cb..263622d8d 100644
--- a/examples/typewriter/main.go
+++ b/examples/typewriter/main.go
@@ -26,8 +26,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 )
 
 // repeatingKeyPressed return true when key is pressed considering the repeat state.
@@ -98,7 +98,7 @@ func main() {
 		counter: 0,
 	}
 
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("TypeWriter (Ebiten Demo)")
 	if err := ebiten.RunGame(g); err != nil {
 		log.Fatal(err)
diff --git a/examples/wav/main.go b/examples/wav/main.go
index 6e254c2ab..af39cccd3 100644
--- a/examples/wav/main.go
+++ b/examples/wav/main.go
@@ -29,8 +29,8 @@ import (
 )
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 	sampleRate   = 44100
 )
 
@@ -96,7 +96,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("WAV (Ebiten Demo)")
 	if err := ebiten.RunGame(&g); err != nil {
 		log.Fatal(err)
diff --git a/examples/wheel/main.go b/examples/wheel/main.go
index ee9a168db..2e8ddf0b6 100644
--- a/examples/wheel/main.go
+++ b/examples/wheel/main.go
@@ -25,15 +25,15 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
 )
 
-var pointerImage = ebiten.NewImage(4, 4)
+var pointerImage = ebiten.NewImage(8, 8)
 
 func init() {
 	pointerImage.Fill(color.RGBA{0xff, 0, 0, 0xff})
 }
 
 const (
-	screenWidth  = 320
-	screenHeight = 240
+	screenWidth  = 640
+	screenHeight = 480
 )
 
 type Game struct {
@@ -65,7 +65,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 func main() {
 	g := &Game{x: 0.0, y: 0.0}
 
-	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
+	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Wheel (Ebiten Demo)")
 	if err := ebiten.RunGame(g); err != nil {
 		log.Fatal(err)