Optimizations and debug options

internal/game/game.go

@@ -273,6 +273,16 @@ func (g *Game) updatePlaying() error {
 	delta := now.Sub(g.state.lastTick)
 	g.state.lastTick = now
 
+	maxDelta := 100 * time.Millisecond
+	if delta > maxDelta {
+		delta = maxDelta
+	}
+
+	minDelta := time.Microsecond
+	if delta < minDelta {
+		delta = minDelta
+	}
+
 	input := readControls()
 	g.state.gameplayScreen.Update(screens.GameplayInput{
 		Left:   input.Left,
@@ -284,7 +294,6 @@ func (g *Game) updatePlaying() error {
 
 	if now.Sub(g.state.lastAutoSave) >= g.state.autoSaveInterval {
 		g.saveGame()
-		g.state.gameplayScreen.ShowSaveNotification()
 		g.state.lastAutoSave = now
 	}