===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,296 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Problem = Container.expand(function (level) {
+	var self = Container.call(this);
+	var problemBg = self.attachAsset('problemBackground', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	problemBg.alpha = 0.9;
+	self.level = level;
+	self.problemData = generateProblem(level);
+	var problemText = new Text2(self.problemData.question, {
+		size: 80,
+		fill: 0x000000
+	});
+	problemText.anchor.set(0.5, 0.5);
+	self.addChild(problemText);
+	return self;
+});
+var SymbolButton = Container.expand(function (symbol, isCorrect) {
+	var self = Container.call(this);
+	var buttonBg = self.attachAsset('symbolButton', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var symbolText = new Text2(symbol, {
+		size: 60,
+		fill: 0xFFFFFF
+	});
+	symbolText.anchor.set(0.5, 0.5);
+	self.addChild(symbolText);
+	self.symbol = symbol;
+	self.isCorrect = isCorrect;
+	self.isPressed = false;
+	self.down = function (x, y, obj) {
+		if (gameState !== 'playing') return;
+		self.isPressed = true;
+		buttonBg.removeChild();
+		var pressedBg = self.attachAsset('symbolButtonPressed', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+		if (self.isCorrect) {
+			handleCorrectAnswer();
+		} else {
+			handleIncorrectAnswer();
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x1a1a2e
+});
+
+/**** 
+* Game Code
+****/ 
+var gameState = 'playing';
+var currentLevel = 1;
+var score = 0;
+var timeRemaining = 15000; // 15 seconds per problem
+var maxTime = 15000;
+var currentProblem = null;
+var symbolButtons = [];
+var timerBar = null;
+// Mathematical problems database
+var problemTypes = {
+	1: [
+	// Basic arithmetic
+	{
+		question: "5 + 3 = ?",
+		answers: ["8", "7", "9", "6"],
+		correct: 0
+	}, {
+		question: "12 - 4 = ?",
+		answers: ["8", "9", "7", "6"],
+		correct: 0
+	}, {
+		question: "6 × 2 = ?",
+		answers: ["12", "10", "14", "8"],
+		correct: 0
+	}, {
+		question: "15 ÷ 3 = ?",
+		answers: ["5", "4", "6", "3"],
+		correct: 0
+	}],
+	2: [
+	// Comparison operators
+	{
+		question: "7 ? 5 (greater)",
+		answers: [">", "<", "=", "≠"],
+		correct: 0
+	}, {
+		question: "4 ? 4 (equal)",
+		answers: ["=", "≠", ">", "<"],
+		correct: 0
+	}, {
+		question: "3 ? 8 (less)",
+		answers: ["<", ">", "=", "≠"],
+		correct: 0
+	}],
+	3: [
+	// Powers and roots
+	{
+		question: "2³ = ?",
+		answers: ["8", "6", "9", "4"],
+		correct: 0
+	}, {
+		question: "√16 = ?",
+		answers: ["4", "3", "5", "2"],
+		correct: 0
+	}, {
+		question: "5² = ?",
+		answers: ["25", "20", "30", "15"],
+		correct: 0
+	}],
+	4: [
+	// Fractions
+	{
+		question: "1/2 + 1/4 = ?",
+		answers: ["3/4", "1/3", "2/6", "1/2"],
+		correct: 0
+	}, {
+		question: "2/3 × 3/2 = ?",
+		answers: ["1", "4/6", "6/6", "2/3"],
+		correct: 0
+	}],
+	5: [
+	// Trigonometry
+	{
+		question: "sin(90°) = ?",
+		answers: ["1", "0", "√2/2", "-1"],
+		correct: 0
+	}, {
+		question: "cos(0°) = ?",
+		answers: ["1", "0", "√2/2", "-1"],
+		correct: 0
+	}]
+};
+function generateProblem(level) {
+	var problemSet = problemTypes[Math.min(level, 5)];
+	if (!problemSet) problemSet = problemTypes[1];
+	var randomProblem = problemSet[Math.floor(Math.random() * problemSet.length)];
+	return randomProblem;
+}
+function createNewProblem() {
+	if (currentProblem) {
+		currentProblem.destroy();
+	}
+	// Clear existing symbol buttons
+	for (var i = 0; i < symbolButtons.length; i++) {
+		symbolButtons[i].destroy();
+	}
+	symbolButtons = [];
+	currentProblem = game.addChild(new Problem(currentLevel));
+	currentProblem.x = 1024;
+	currentProblem.y = 800;
+	// Create symbol buttons
+	var problemData = currentProblem.problemData;
+	var buttonY = 1400;
+	var buttonSpacing = 200;
+	var startX = 1024 - buttonSpacing * 1.5;
+	for (var i = 0; i < problemData.answers.length; i++) {
+		var button = game.addChild(new SymbolButton(problemData.answers[i], i === problemData.correct));
+		button.x = startX + i * buttonSpacing;
+		button.y = buttonY;
+		symbolButtons.push(button);
+	}
+	// Reset timer
+	timeRemaining = maxTime;
+	updateTimerBar();
+}
+function handleCorrectAnswer() {
+	gameState = 'answering';
+	LK.getSound('correct').play();
+	// Flash green
+	var flash = game.addChild(LK.getAsset('correctFlash', {
+		alpha: 0.3
+	}));
+	tween(flash, {
+		alpha: 0
+	}, {
+		duration: 500,
+		onFinish: function onFinish() {
+			flash.destroy();
+		}
+	});
+	// Update score
+	var timeBonus = Math.floor(timeRemaining / 1000);
+	var levelBonus = currentLevel * 10;
+	score += 100 + timeBonus + levelBonus;
+	LK.setScore(score);
+	updateScoreDisplay();
+	// Advance level every 3 correct answers
+	if (score % 300 === 0) {
+		currentLevel++;
+	}
+	// Create new problem after delay
+	LK.setTimeout(function () {
+		gameState = 'playing';
+		createNewProblem();
+	}, 1000);
+}
+function handleIncorrectAnswer() {
+	gameState = 'answering';
+	LK.getSound('incorrect').play();
+	// Flash red
+	var flash = game.addChild(LK.getAsset('incorrectFlash', {
+		alpha: 0.3
+	}));
+	tween(flash, {
+		alpha: 0
+	}, {
+		duration: 500,
+		onFinish: function onFinish() {
+			flash.destroy();
+		}
+	});
+	// Show correct answer
+	showCorrectAnswer();
+	// Game over after delay
+	LK.setTimeout(function () {
+		LK.showGameOver();
+	}, 2000);
+}
+function showCorrectAnswer() {
+	var correctText = new Text2("Correct answer: " + currentProblem.problemData.answers[currentProblem.problemData.correct], {
+		size: 60,
+		fill: 0xFFFFFF
+	});
+	correctText.anchor.set(0.5, 0.5);
+	correctText.x = 1024;
+	correctText.y = 1800;
+	game.addChild(correctText);
+}
+function updateTimerBar() {
+	if (timerBar) {
+		timerBar.destroy();
+	}
+	var barWidth = timeRemaining / maxTime * 1800;
+	timerBar = game.addChild(LK.getAsset('timerBar', {
+		width: barWidth,
+		anchorX: 0,
+		anchorY: 0
+	}));
+	timerBar.x = 124;
+	timerBar.y = 200;
+	// Change color based on time remaining
+	if (timeRemaining < 5000) {
+		timerBar.tint = 0xff0000; // Red
+	} else if (timeRemaining < 10000) {
+		timerBar.tint = 0xffaa00; // Orange
+	} else {
+		timerBar.tint = 0x00aa00; // Green
+	}
+}
+// UI Setup
+var scoreText = new Text2('Score: 0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreText);
+var levelText = new Text2('Level: 1', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+levelText.anchor.set(1, 0);
+LK.gui.topRight.addChild(levelText);
+function updateScoreDisplay() {
+	scoreText.setText('Score: ' + score);
+	levelText.setText('Level: ' + currentLevel);
+}
+// Initialize first problem
+createNewProblem();
+game.update = function () {
+	if (gameState !== 'playing') return;
+	// Update timer
+	timeRemaining -= 16.67; // Approximately 60 FPS
+	if (timeRemaining <= 0) {
+		// Time's up - wrong answer
+		handleIncorrectAnswer();
+		return;
+	}
+	updateTimerBar();
+};
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