===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,290 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var FallingNumber = Container.expand(function (value, isBonus) {
+	var self = Container.call(this);
+	self.value = value;
+	self.isBonus = isBonus || false;
+	self.fallSpeed = 3 + Math.random() * 2;
+	self.collected = false;
+	var bgAsset = self.isBonus ? 'bonusBg' : 'numberBg';
+	var background = self.attachAsset(bgAsset, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var numberText = new Text2(value.toString(), {
+		size: 60,
+		fill: 0xFFFFFF
+	});
+	numberText.anchor.set(0.5, 0.5);
+	self.addChild(numberText);
+	if (self.isBonus) {
+		background.tint = 0xFFD700;
+		tween(background, {
+			scaleX: 1.2,
+			scaleY: 1.2
+		}, {
+			duration: 500,
+			easing: tween.easeInOut,
+			onFinish: function onFinish() {
+				tween(background, {
+					scaleX: 1,
+					scaleY: 1
+				}, {
+					duration: 500,
+					easing: tween.easeInOut
+				});
+			}
+		});
+	}
+	self.update = function () {
+		if (!self.collected) {
+			self.y += self.fallSpeed;
+		}
+	};
+	self.down = function (x, y, obj) {
+		if (!self.collected) {
+			self.collected = true;
+			collectItem(self);
+		}
+	};
+	return self;
+});
+var FallingOperator = Container.expand(function (operator) {
+	var self = Container.call(this);
+	self.value = operator;
+	self.fallSpeed = 3 + Math.random() * 2;
+	self.collected = false;
+	var background = self.attachAsset('operatorBg', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var operatorText = new Text2(operator, {
+		size: 70,
+		fill: 0xFFFFFF
+	});
+	operatorText.anchor.set(0.5, 0.5);
+	self.addChild(operatorText);
+	self.update = function () {
+		if (!self.collected) {
+			self.y += self.fallSpeed;
+		}
+	};
+	self.down = function (x, y, obj) {
+		if (!self.collected) {
+			self.collected = true;
+			collectItem(self);
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x2C3E50
+});
+
+/**** 
+* Game Code
+****/ 
+var fallingItems = [];
+var currentEquation = [];
+var gameSpeed = 1;
+var spawnTimer = 0;
+var maxItemsOnScreen = 8;
+var consecutiveCorrect = 0;
+var gameLevel = 1;
+// UI Elements
+var scoreText = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0, 0);
+LK.gui.topRight.addChild(scoreText);
+scoreText.x = -20;
+scoreText.y = 20;
+var levelText = new Text2('Level: 1', {
+	size: 50,
+	fill: 0xFFFFFF
+});
+levelText.anchor.set(0, 0);
+LK.gui.topRight.addChild(levelText);
+levelText.x = -20;
+levelText.y = 90;
+var equationDisplay = new Text2('', {
+	size: 80,
+	fill: 0x000000
+});
+equationDisplay.anchor.set(0.5, 0.5);
+var equationContainer = game.addChild(new Container());
+equationContainer.x = 1024;
+equationContainer.y = 150;
+var equationBg = equationContainer.attachAsset('equationBar', {
+	anchorX: 0.5,
+	anchorY: 0.5
+});
+equationContainer.addChild(equationDisplay);
+function getRandomNumber() {
+	var maxNum = Math.min(9, Math.floor(gameLevel / 2) + 3);
+	return Math.floor(Math.random() * maxNum) + 1;
+}
+function getRandomOperator() {
+	var operators = ['+', '-'];
+	if (gameLevel > 3) operators.push('×');
+	if (gameLevel > 5) operators.push('÷');
+	return operators[Math.floor(Math.random() * operators.length)];
+}
+function spawnItem() {
+	if (fallingItems.length >= maxItemsOnScreen) return;
+	var x = 200 + Math.random() * 1648;
+	var y = -100;
+	var item;
+	if (Math.random() < 0.3) {
+		// Spawn operator
+		item = new FallingOperator(getRandomOperator());
+	} else {
+		// Spawn number
+		var isBonus = Math.random() < 0.1 && gameLevel > 2;
+		item = new FallingNumber(getRandomNumber(), isBonus);
+	}
+	item.x = x;
+	item.y = y;
+	fallingItems.push(item);
+	game.addChild(item);
+}
+function collectItem(item) {
+	currentEquation.push(item.value);
+	updateEquationDisplay();
+	LK.getSound('collect').play();
+	tween(item, {
+		alpha: 0,
+		scaleX: 1.5,
+		scaleY: 1.5
+	}, {
+		duration: 200,
+		onFinish: function onFinish() {
+			removeItem(item);
+		}
+	});
+	checkEquation();
+}
+function updateEquationDisplay() {
+	equationDisplay.setText(currentEquation.join(' '));
+}
+function checkEquation() {
+	if (currentEquation.length >= 3) {
+		var equation = currentEquation.join('');
+		if (isValidEquation()) {
+			evaluateEquation();
+		}
+	}
+}
+function isValidEquation() {
+	if (currentEquation.length < 3) return false;
+	// Check pattern: number operator number
+	var hasNumber1 = typeof currentEquation[0] === 'number';
+	var hasOperator = typeof currentEquation[1] === 'string' && ['+', '-', '×', '÷'].includes(currentEquation[1]);
+	var hasNumber2 = typeof currentEquation[2] === 'number';
+	return hasNumber1 && hasOperator && hasNumber2;
+}
+function evaluateEquation() {
+	var num1 = currentEquation[0];
+	var operator = currentEquation[1];
+	var num2 = currentEquation[2];
+	var result;
+	switch (operator) {
+		case '+':
+			result = num1 + num2;
+			break;
+		case '-':
+			result = num1 - num2;
+			break;
+		case '×':
+			result = num1 * num2;
+			break;
+		case '÷':
+			result = Math.floor(num1 / num2);
+			break;
+	}
+	var points = calculatePoints(num1, operator, num2);
+	LK.setScore(LK.getScore() + points);
+	scoreText.setText('Score: ' + LK.getScore());
+	consecutiveCorrect++;
+	LK.getSound('correct').play();
+	LK.effects.flashObject(equationContainer, 0x00FF00, 500);
+	currentEquation = [];
+	updateEquationDisplay();
+	// Level progression
+	if (LK.getScore() > gameLevel * 500) {
+		gameLevel++;
+		levelText.setText('Level: ' + gameLevel);
+		gameSpeed += 0.2;
+		maxItemsOnScreen = Math.min(12, maxItemsOnScreen + 1);
+	}
+}
+function calculatePoints(num1, operator, num2) {
+	var basePoints = 10;
+	switch (operator) {
+		case '+':
+		case '-':
+			basePoints = 10;
+			break;
+		case '×':
+			basePoints = 20;
+			break;
+		case '÷':
+			basePoints = 25;
+			break;
+	}
+	// Bonus for consecutive correct answers
+	basePoints += consecutiveCorrect * 5;
+	return basePoints;
+}
+function removeItem(item) {
+	var index = fallingItems.indexOf(item);
+	if (index > -1) {
+		fallingItems.splice(index, 1);
+	}
+	item.destroy();
+}
+function checkGameOver() {
+	var itemsAtBottom = 0;
+	for (var i = 0; i < fallingItems.length; i++) {
+		if (fallingItems[i].y > 2732) {
+			itemsAtBottom++;
+		}
+	}
+	if (itemsAtBottom >= 5) {
+		LK.showGameOver();
+	}
+}
+game.update = function () {
+	spawnTimer++;
+	var spawnRate = Math.max(30, 120 - gameLevel * 10);
+	if (spawnTimer >= spawnRate) {
+		spawnItem();
+		spawnTimer = 0;
+	}
+	// Remove items that have fallen off screen
+	for (var i = fallingItems.length - 1; i >= 0; i--) {
+		var item = fallingItems[i];
+		if (item.y > 2800) {
+			removeItem(item);
+		}
+	}
+	checkGameOver();
+};
+game.down = function (x, y, obj) {
+	// Clear equation if clicked on empty space
+	if (currentEquation.length > 0) {
+		currentEquation = [];
+		updateEquationDisplay();
+	}
+};
\ No newline at end of file