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

/**** 
* Classes
****/ 
// Pad class for colored buttons
var Pad = Container.expand(function () {
	var self = Container.call(this);
	// Properties: colorName, soundId, assetId, index
	self.colorName = '';
	self.soundId = '';
	self.assetId = '';
	self.index = 0;
	// Attach asset
	var padAsset = null;
	self.initPad = function (colorName, soundId, assetId, index) {
		self.colorName = colorName;
		self.soundId = soundId;
		self.assetId = assetId;
		self.index = index;
		padAsset = self.attachAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		// For touch feedback, store reference
		self.padAsset = padAsset;
	};
	// Flash the pad (light up effect)
	self.flash = function (duration) {
		// Animate scale up and alpha up, then back
		tween(self.padAsset, {
			scaleX: 1.15,
			scaleY: 1.15,
			alpha: 1
		}, {
			duration: duration / 2,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(self.padAsset, {
					scaleX: 1,
					scaleY: 1,
					alpha: 0.85
				}, {
					duration: duration / 2,
					easing: tween.easeIn
				});
			}
		});
	};
	// Play the pad's sound
	self.playSound = function () {
		LK.getSound(self.soundId).play();
	};
	// Enable/disable pad for input
	self.setEnabled = function (enabled) {
		self.enabled = enabled;
		self.padAsset.alpha = enabled ? 0.85 : 0.5;
	};
	// Touch/click event
	self.down = function (x, y, obj) {
		if (!self.enabled) return;
		// Visual feedback
		self.flash(180);
		self.playSound();
		// Notify game
		if (typeof self.onPadPressed === 'function') {
			self.onPadPressed(self.index);
		}
	};
	// Set default alpha
	self.padAsset = padAsset;
	if (self.padAsset) {
		self.padAsset.alpha = 0.85;
	}
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181818
});

/**** 
* Game Code
****/ 
// Simple background music (optional, can be replaced with actual music asset)
// Sounds for each pad
// Four colored pads (Red, Blue, Green, Yellow)
// Pad definitions
var padDefs = [{
	colorName: 'red',
	soundId: 'sndRed',
	assetId: 'padRed'
}, {
	colorName: 'blue',
	soundId: 'sndBlue',
	assetId: 'padBlue'
}, {
	colorName: 'green',
	soundId: 'sndGreen',
	assetId: 'padGreen'
}, {
	colorName: 'yellow',
	soundId: 'sndYellow',
	assetId: 'padYellow'
}];
// Pad positions (2x2 grid, centered)
var padPositions = [{
	x: 2048 / 2 - 340,
	y: 2732 / 2 - 340
},
// Top-left (Red)
{
	x: 2048 / 2 + 340,
	y: 2732 / 2 - 340
},
// Top-right (Blue)
{
	x: 2048 / 2 - 340,
	y: 2732 / 2 + 340
},
// Bottom-left (Green)
{
	x: 2048 / 2 + 340,
	y: 2732 / 2 + 340
} // Bottom-right (Yellow)
];
// Game state variables
var pads = [];
var sequence = [];
var playerStep = 0;
var isPlayerTurn = false;
var isAnimating = false;
var score = 0;
var highScore = 0;
var sequenceTimer = null;
var showSequenceIndex = 0;
// Score text
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// "Get Ready" text
var infoTxt = new Text2('', {
	size: 90,
	fill: 0xFFFBE0
});
infoTxt.anchor.set(0.5, 0.5);
infoTxt.visible = false;
LK.gui.center.addChild(infoTxt);
// Create pads and add to game
for (var i = 0; i < 4; i++) {
	var pad = new Pad();
	pad.initPad(padDefs[i].colorName, padDefs[i].soundId, padDefs[i].assetId, i);
	pad.x = padPositions[i].x;
	pad.y = padPositions[i].y;
	pad.setEnabled(false);
	// Pad press callback
	pad.onPadPressed = function (padIndex) {
		if (!isPlayerTurn || isAnimating) return;
		handlePlayerInput(padIndex);
	};
	pads.push(pad);
	game.addChild(pad);
}
// Start background music
LK.playMusic('bgmusic', {
	fade: {
		start: 0,
		end: 1,
		duration: 1200
	}
});
// Start the game
startNewGame();
function startNewGame() {
	sequence = [];
	playerStep = 0;
	score = 0;
	isPlayerTurn = false;
	isAnimating = false;
	showSequenceIndex = 0;
	scoreTxt.setText('0');
	infoTxt.setText('Get Ready!');
	infoTxt.visible = true;
	setPadsEnabled(false);
	// Short delay before first round
	LK.setTimeout(function () {
		infoTxt.visible = false;
		addToSequence();
		showSequence();
	}, 900);
}
function setPadsEnabled(enabled) {
	for (var i = 0; i < pads.length; i++) {
		pads[i].setEnabled(enabled);
	}
}
// Add a random color to the sequence
function addToSequence() {
	var next = Math.floor(Math.random() * 4);
	sequence.push(next);
}
// Show the sequence to the player (one by one)
function showSequence() {
	isAnimating = true;
	isPlayerTurn = false;
	setPadsEnabled(false);
	showSequenceIndex = 0;
	playSequenceStep();
}
function playSequenceStep() {
	if (showSequenceIndex >= sequence.length) {
		// Sequence done, player's turn
		isAnimating = false;
		isPlayerTurn = true;
		setPadsEnabled(true);
		playerStep = 0;
		return;
	}
	var padIndex = sequence[showSequenceIndex];
	var pad = pads[padIndex];
	pad.flash(320);
	pad.playSound();
	showSequenceIndex++;
	sequenceTimer = LK.setTimeout(playSequenceStep, 480);
}
// Handle player input
function handlePlayerInput(padIndex) {
	if (!isPlayerTurn || isAnimating) return;
	// Check if correct
	if (padIndex === sequence[playerStep]) {
		playerStep++;
		if (playerStep === sequence.length) {
			// Completed sequence, next round
			score++;
			scoreTxt.setText(score + '');
			isPlayerTurn = false;
			setPadsEnabled(false);
			LK.setTimeout(function () {
				addToSequence();
				showSequence();
			}, 700);
		}
	} else {
		// Wrong input, game over
		pads[padIndex].flash(400);
		LK.effects.flashScreen(0xff0000, 800);
		setPadsEnabled(false);
		infoTxt.setText('Game Over');
		infoTxt.visible = true;
		LK.setTimeout(function () {
			infoTxt.visible = false;
			LK.showGameOver();
		}, 1200);
	}
}
// Optional: allow restart on game over by tapping anywhere
game.down = function (x, y, obj) {
	// Only allow restart if not animating and not player's turn
	if (!isPlayerTurn && !isAnimating && !infoTxt.visible) {
		startNewGame();
	}
};
// Clean up on destroy (not strictly needed, but good practice)
game.destroy = function () {
	if (sequenceTimer) LK.clearTimeout(sequenceTimer);
	LK.stopMusic();
};
// Main update loop (not much needed here)
game.update = function () {
	// No per-frame logic needed for this game
};

===================================================================
--- original.js
+++ change.js
@@ -71,9 +71,11 @@
 		}
 	};
 	// Set default alpha
 	self.padAsset = padAsset;
-	self.padAsset.alpha = 0.85;
+	if (self.padAsset) {
+		self.padAsset.alpha = 0.85;
+	}
 	return self;
 });
 
 /****