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

/**** 
* Classes
****/ 
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.hitCount = 0;
	self.flames = [];
	self.reset = function () {
		self.x = 1024;
		self.y = 1366;
		self.velocityX = (Math.random() > 0.5 ? 1 : -1) * 6;
		self.velocityY = (Math.random() - 0.5) * 4;
		self.hitCount = 0;
		self.clearFlames();
	};
	self.hit = function () {
		self.hitCount++;
		totalHits++;
		// Increase speed
		var speedMultiplier = 1 + self.hitCount * 0.1;
		self.velocityX *= speedMultiplier;
		self.velocityY *= speedMultiplier;
		// Add flame trail after 5th hit
		if (self.hitCount >= 5) {
			self.addFlame();
		}
		LK.getSound('paddleHit').play();
	};
	self.addFlame = function () {
		var flame = game.addChild(LK.getAsset('flame', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: self.x,
			y: self.y,
			alpha: 0.8
		}));
		self.flames.push(flame);
		// Limit flame trail length (more flames as hit count increases)
		var maxFlames = Math.min(self.hitCount - 4, 6);
		if (self.flames.length > maxFlames) {
			var oldFlame = self.flames.shift();
			oldFlame.destroy();
		}
		// Fade out flame
		tween(flame, {
			alpha: 0
		}, {
			duration: 800,
			onFinish: function onFinish() {
				var index = self.flames.indexOf(flame);
				if (index !== -1) {
					self.flames.splice(index, 1);
					flame.destroy();
				}
			}
		});
	};
	self.clearFlames = function () {
		for (var i = 0; i < self.flames.length; i++) {
			self.flames[i].destroy();
		}
		self.flames = [];
	};
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Bounce off top and bottom walls
		if (self.y <= 10 || self.y >= 2722) {
			self.velocityY *= -1;
			LK.getSound('wallHit').play();
		}
		// Check scoring
		if (self.x < 0) {
			aiScore++;
			self.scorePoint();
		} else if (self.x > 2048) {
			playerScore++;
			self.scorePoint();
		}
	};
	self.scorePoint = function () {
		LK.getSound('score').play();
		updateScore();
		if (playerScore >= 5 || aiScore >= 5) {
			endGame();
		} else {
			self.reset();
		}
	};
	return self;
});
var DifficultyButton = Container.expand(function (text, difficulty) {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('difficultyButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.difficulty = difficulty;
	var buttonText = new Text2(text, {
		size: 40,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	self.addChild(buttonText);
	self.down = function (x, y, obj) {
		selectedDifficulty = self.difficulty;
		hideDifficultySelection();
		startNewGame();
	};
	return self;
});
var Paddle = Container.expand(function () {
	var self = Container.call(this);
	var paddleGraphics = self.attachAsset('paddle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.isAI = false;
	self.difficulty = 'medium';
	self.moveToY = function (targetY) {
		var diff = targetY - self.y;
		if (Math.abs(diff) > 2) {
			var moveSpeed = self.speed;
			if (self.isAI) {
				switch (self.difficulty) {
					case 'easy':
						moveSpeed = 4;
						break;
					case 'medium':
						moveSpeed = 6;
						break;
					case 'hard':
						moveSpeed = 8;
						break;
					case 'impossible':
						moveSpeed = 20;
						break;
				}
			}
			self.y += Math.sign(diff) * Math.min(Math.abs(diff), moveSpeed);
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x001122
});

/**** 
* Game Code
****/ 
/**** 
* Game Variables
****/ 
var playerPaddle;
var aiPaddle;
var ball;
var playerScore = 0;
var aiScore = 0;
var totalHits = storage.totalHits || 0;
var gamesWon = storage.gamesWon || 0;
var matchNumber = storage.matchNumber || 1;
var selectedDifficulty = storage.selectedDifficulty || null;
var gameStarted = false;
var difficultyButtons = [];
var showingDifficulty = false;
// UI Elements
var playerScoreText;
var aiScoreText;
var gamesWonText;
var totalHitsText;
var matchNumberText;
var instructionText;
var scoreboardText;
function initializeUI() {
	// Player score (left)
	playerScoreText = new Text2('0', {
		size: 80,
		fill: 0xFFFFFF
	});
	playerScoreText.anchor.set(0.5, 0);
	playerScoreText.x = 512;
	playerScoreText.y = 100;
	LK.gui.addChild(playerScoreText);
	// AI score (right)
	aiScoreText = new Text2('0', {
		size: 80,
		fill: 0xFFFFFF
	});
	aiScoreText.anchor.set(0.5, 0);
	aiScoreText.x = 1536;
	aiScoreText.y = 100;
	LK.gui.addChild(aiScoreText);
	// Games won (top-left)
	gamesWonText = new Text2('Wins: ' + gamesWon, {
		size: 30,
		fill: 0xFFFFFF
	});
	gamesWonText.anchor.set(0, 0);
	gamesWonText.x = 120;
	gamesWonText.y = 20;
	LK.gui.addChild(gamesWonText);
	// Total hits (top-right)
	totalHitsText = new Text2('Hits: ' + totalHits, {
		size: 30,
		fill: 0xFFFFFF
	});
	totalHitsText.anchor.set(1, 0);
	totalHitsText.x = 1928;
	totalHitsText.y = 20;
	LK.gui.addChild(totalHitsText);
	// Scoreboard (center top)
	scoreboardText = new Text2('0 - 0', {
		size: 60,
		fill: 0xFFFFFF
	});
	scoreboardText.anchor.set(0.5, 0);
	scoreboardText.x = 1024;
	scoreboardText.y = 150;
	LK.gui.addChild(scoreboardText);
	// Match number (under scoreboard)
	matchNumberText = new Text2('Match ' + matchNumber, {
		size: 40,
		fill: 0xCCCCCC
	});
	matchNumberText.anchor.set(0.5, 0);
	matchNumberText.x = 1024;
	matchNumberText.y = 220;
	LK.gui.addChild(matchNumberText);
	// Instruction text
	instructionText = new Text2('Touch to start', {
		size: 50,
		fill: 0xFFFFFF
	});
	instructionText.anchor.set(0.5, 0.5);
	instructionText.x = 1024;
	instructionText.y = 1366;
	LK.gui.addChild(instructionText);
}
function createGameObjects() {
	// Player paddle (left)
	playerPaddle = game.addChild(new Paddle());
	playerPaddle.x = 50;
	playerPaddle.y = 1366;
	// AI paddle (right)
	aiPaddle = game.addChild(new Paddle());
	aiPaddle.x = 1998;
	aiPaddle.y = 1366;
	aiPaddle.isAI = true;
	aiPaddle.difficulty = selectedDifficulty || 'medium';
	// Ball
	ball = game.addChild(new Ball());
	ball.reset();
}
function showDifficultySelection() {
	showingDifficulty = true;
	var difficulties = [{
		text: 'Easy',
		difficulty: 'easy'
	}, {
		text: 'Medium',
		difficulty: 'medium'
	}, {
		text: 'Hard',
		difficulty: 'hard'
	}, {
		text: 'Impossible',
		difficulty: 'impossible'
	}];
	for (var i = 0; i < difficulties.length; i++) {
		var button = game.addChild(new DifficultyButton(difficulties[i].text, difficulties[i].difficulty));
		button.x = 1024;
		button.y = 800 + i * 120;
		difficultyButtons.push(button);
	}
	instructionText.setText('Select Difficulty');
}
function hideDifficultySelection() {
	showingDifficulty = false;
	for (var i = 0; i < difficultyButtons.length; i++) {
		difficultyButtons[i].destroy();
	}
	difficultyButtons = [];
}
function startNewGame() {
	playerScore = 0;
	aiScore = 0;
	gameStarted = true;
	if (!playerPaddle) {
		createGameObjects();
	}
	aiPaddle.difficulty = selectedDifficulty;
	ball.reset();
	updateScore();
	instructionText.setText('');
	// Save difficulty selection
	storage.selectedDifficulty = selectedDifficulty;
}
function updateScore() {
	playerScoreText.setText(playerScore.toString());
	aiScoreText.setText(aiScore.toString());
	scoreboardText.setText(playerScore + ' - ' + aiScore);
	totalHitsText.setText('Hits: ' + totalHits);
	storage.totalHits = totalHits;
}
function endGame() {
	gameStarted = false;
	if (playerScore >= 5) {
		gamesWon++;
		storage.gamesWon = gamesWon;
		gamesWonText.setText('Wins: ' + gamesWon);
		instructionText.setText('Congratulations on winning!\nTouch to play again');
	} else {
		instructionText.setText('Game Over\nTouch to play again');
	}
	matchNumber++;
	storage.matchNumber = matchNumber;
	matchNumberText.setText('Match ' + matchNumber);
	ball.clearFlames();
}
function checkCollisions() {
	// Ball vs player paddle
	if (ball.velocityX < 0 && ball.intersects(playerPaddle)) {
		ball.velocityX = Math.abs(ball.velocityX);
		ball.velocityY += (ball.y - playerPaddle.y) * 0.1;
		ball.hit();
	}
	// Ball vs AI paddle
	if (ball.velocityX > 0 && ball.intersects(aiPaddle)) {
		ball.velocityX = -Math.abs(ball.velocityX);
		ball.velocityY += (ball.y - aiPaddle.y) * 0.1;
		ball.hit();
	}
}
// Initialize UI
initializeUI();
// Check if difficulty needs to be selected
if (!selectedDifficulty) {
	showDifficultySelection();
} else {
	createGameObjects();
}
game.move = function (x, y, obj) {
	if (gameStarted) {
		playerPaddle.y = y;
	}
};
game.down = function (x, y, obj) {
	if (showingDifficulty) {
		return; // Let difficulty buttons handle this
	}
	if (!gameStarted) {
		if (selectedDifficulty) {
			startNewGame();
		}
	} else {
		playerPaddle.y = y;
	}
};
game.update = function () {
	if (gameStarted) {
		// AI paddle movement
		var targetY = ball.y;
		if (selectedDifficulty === 'easy') {
			// Add some delay and imperfection
			targetY += (Math.random() - 0.5) * 100;
		} else if (selectedDifficulty === 'medium') {
			targetY += (Math.random() - 0.5) * 50;
		} else if (selectedDifficulty === 'hard') {
			targetY += (Math.random() - 0.5) * 20;
		}
		// 'impossible' has perfect tracking
		aiPaddle.moveToY(targetY);
		checkCollisions();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -187,8 +187,9 @@
 var gamesWonText;
 var totalHitsText;
 var matchNumberText;
 var instructionText;
+var scoreboardText;
 function initializeUI() {
 	// Player score (left)
 	playerScoreText = new Text2('0', {
 		size: 80,
@@ -225,9 +226,9 @@
 	totalHitsText.x = 1928;
 	totalHitsText.y = 20;
 	LK.gui.addChild(totalHitsText);
 	// Scoreboard (center top)
-	var scoreboardText = new Text2('0 - 0', {
+	scoreboardText = new Text2('0 - 0', {
 		size: 60,
 		fill: 0xFFFFFF
 	});
 	scoreboardText.anchor.set(0.5, 0);