diff --git a/cmd/client/game_render.go b/cmd/client/game_render.go
index 8818540..7094c17 100644
--- a/cmd/client/game_render.go
+++ b/cmd/client/game_render.go
@@ -426,11 +426,11 @@ func (g *Game) DrawGame(screen *ebiten.Image) {
 
 	// 8. TOUCH CONTROLS OVERLAY (nur wenn Tastatur nicht benutzt wurde)
 	if !g.keyboardUsed {
-		canvasW, canvasH := screen.Size()
+		canvasW, _ := screen.Size()
 
-		// A) Joystick Base (unten links, relativ zu Canvas)
+		// A) Joystick Base (unten links, relativ zu Viewport)
 		joyX := 150.0
-		joyY := float64(canvasH) - 150.0
+		joyY := float64(ScreenHeight) - 150.0 // ScreenHeight statt canvasH!
 		baseCol := color.RGBA{80, 80, 80, 50}
 		vector.DrawFilledCircle(screen, float32(joyX), float32(joyY), 60, baseCol, false)
 		vector.StrokeCircle(screen, float32(joyX), float32(joyY), 60, 2, color.RGBA{100, 100, 100, 100}, false)
@@ -442,9 +442,9 @@ func (g *Game) DrawGame(screen *ebiten.Image) {
 		}
 		vector.DrawFilledCircle(screen, float32(g.joyStickX), float32(g.joyStickY), 30, knobCol, false)
 
-		// C) Jump Button (unten rechts, relativ zu Canvas)
+		// C) Jump Button (unten rechts, relativ zu Viewport)
 		jumpX := float32(canvasW) - 150
-		jumpY := float32(canvasH) - 150
+		jumpY := float32(ScreenHeight) - 150 // ScreenHeight statt canvasH!
 		vector.DrawFilledCircle(screen, jumpX, jumpY, 50, color.RGBA{255, 0, 0, 50}, false)
 		vector.StrokeCircle(screen, jumpX, jumpY, 50, 2, color.RGBA{255, 0, 0, 100}, false)
 		text.Draw(screen, "JUMP", basicfont.Face7x13, int(jumpX)-15, int(jumpY)+5, color.RGBA{255, 255, 255, 150})