/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var PianoKey = Container.expand(function (keyIndex) {
	var self = Container.call(this);
	self.keyIndex = keyIndex;
	self.isHighlighted = false;
	self.isPressed = false;
	// Create visual elements
	var normalKey = self.attachAsset('pianoKey', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var highlightKey = self.attachAsset('pianoKeyHighlight', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	var pressedKey = self.attachAsset('pianoKeyPressed', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	// Add key label
	var keyLabel = new Text2((keyIndex + 1).toString(), {
		size: 80,
		fill: 0x000000
	});
	keyLabel.anchor.set(0.5, 0.5);
	self.addChild(keyLabel);
	self.highlight = function () {
		self.isHighlighted = true;
		highlightKey.alpha = 1;
		normalKey.alpha = 0;
	};
	self.unhighlight = function () {
		self.isHighlighted = false;
		highlightKey.alpha = 0;
		normalKey.alpha = 1;
		pressedKey.alpha = 0;
	};
	self.showPressed = function () {
		self.isPressed = true;
		pressedKey.alpha = 1;
		highlightKey.alpha = 0;
		normalKey.alpha = 0;
	};
	self.down = function (x, y, obj) {
		if (self.isHighlighted) {
			handleKeyPress(self.keyIndex, true);
		} else {
			handleKeyPress(self.keyIndex, false);
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2c3e50
});

/**** 
* Game Code
****/ 
var pianoKeys = [];
var currentHighlightedKey = -1;
var gameStarted = false;
var timeLeft = 0;
var maxTime = 2000; // 2 seconds initially
var gameTimer = null;
var speedIncrement = 0;
// Create score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
// Create timer display
var timerTxt = new Text2('Ready!', {
	size: 80,
	fill: 0xFFFFFF
});
timerTxt.anchor.set(0.5, 0.5);
game.addChild(timerTxt);
timerTxt.x = 2048 / 2;
timerTxt.y = 400;
// Create piano keys in a 2x2 grid
for (var i = 0; i < 4; i++) {
	var key = new PianoKey(i);
	var row = Math.floor(i / 2);
	var col = i % 2;
	key.x = 2048 / 2 + (col - 0.5) * 450;
	key.y = 2732 / 2 + (row - 0.5) * 200;
	pianoKeys.push(key);
	game.addChild(key);
}
// Start instruction
var instructionTxt = new Text2('Tap the highlighted key!', {
	size: 60,
	fill: 0xFFFFFF
});
instructionTxt.anchor.set(0.5, 0.5);
game.addChild(instructionTxt);
instructionTxt.x = 2048 / 2;
instructionTxt.y = 2000;
function startNewRound() {
	// Clear any existing highlights
	for (var i = 0; i < pianoKeys.length; i++) {
		pianoKeys[i].unhighlight();
	}
	// Select random key to highlight
	currentHighlightedKey = Math.floor(Math.random() * 4);
	pianoKeys[currentHighlightedKey].highlight();
	// Set timer
	timeLeft = maxTime - speedIncrement * 50; // Increase speed over time
	if (timeLeft < 800) timeLeft = 800; // Minimum time
	// Clear any existing timer
	if (gameTimer) {
		LK.clearTimeout(gameTimer);
	}
	// Set timeout for this round
	gameTimer = LK.setTimeout(function () {
		// Time's up!
		handleKeyPress(-1, false);
	}, timeLeft);
	gameStarted = true;
}
function handleKeyPress(keyIndex, isCorrect) {
	if (!gameStarted) return;
	// Clear timer
	if (gameTimer) {
		LK.clearTimeout(gameTimer);
		gameTimer = null;
	}
	if (isCorrect && keyIndex === currentHighlightedKey) {
		// Correct key pressed
		pianoKeys[keyIndex].showPressed();
		// Play corresponding note
		var soundId = 'note' + (keyIndex + 1);
		LK.getSound(soundId).play();
		// Increase score
		LK.setScore(LK.getScore() + 10);
		scoreTxt.setText(LK.getScore());
		// Increase speed every 50 points
		speedIncrement = Math.floor(LK.getScore() / 50);
		// Brief pause before next round
		LK.setTimeout(function () {
			startNewRound();
		}, 300);
	} else {
		// Wrong key or timeout
		LK.getSound('wrong').play();
		// Flash screen red
		LK.effects.flashScreen(0xff0000, 1000);
		gameStarted = false;
		LK.showGameOver();
	}
}
// Update timer display
game.update = function () {
	if (gameStarted && gameTimer) {
		var remaining = Math.max(0, timeLeft - LK.ticks * 16.67); // Approximate ms
		timerTxt.setText(Math.ceil(remaining / 1000).toString());
		// Change color as time runs out
		if (remaining < 500) {
			timerTxt.fill = "#ff0000";
		} else if (remaining < 1000) {
			timerTxt.fill = "#ffaa00";
		} else {
			timerTxt.fill = "#ffffff";
		}
	}
};
// Start first round after brief delay
LK.setTimeout(function () {
	timerTxt.setText('');
	startNewRound();
}, 1500);

===================================================================
--- original.js
+++ change.js
@@ -172,13 +172,13 @@
 		var remaining = Math.max(0, timeLeft - LK.ticks * 16.67); // Approximate ms
 		timerTxt.setText(Math.ceil(remaining / 1000).toString());
 		// Change color as time runs out
 		if (remaining < 500) {
-			timerTxt.style.fill = "#ff0000";
+			timerTxt.fill = "#ff0000";
 		} else if (remaining < 1000) {
-			timerTxt.style.fill = "#ffaa00";
+			timerTxt.fill = "#ffaa00";
 		} else {
-			timerTxt.style.fill = "#ffffff";
+			timerTxt.fill = "#ffffff";
 		}
 	}
 };
 // Start first round after brief delay