===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,207 @@
-/****
+/**** 
+* Classes
+****/ 
+var Ground = Container.expand(function (x) {
+	var self = Container.call(this);
+	var groundGraphics = self.attachAsset('ground', {
+		anchorX: 0,
+		anchorY: 0
+	});
+	self.x = x;
+	self.y = 2440;
+	self.scrollSpeed = -8;
+	self.update = function () {
+		self.x += self.scrollSpeed;
+	};
+	return self;
+});
+var Obstacle = Container.expand(function (type, x, y) {
+	var self = Container.call(this);
+	self.type = type;
+	var obstacleGraphics;
+	if (type === 'spike') {
+		obstacleGraphics = self.attachAsset('spike', {
+			anchorX: 0.5,
+			anchorY: 1.0
+		});
+	} else if (type === 'block') {
+		obstacleGraphics = self.attachAsset('block', {
+			anchorX: 0.5,
+			anchorY: 1.0
+		});
+	}
+	self.x = x;
+	self.y = y;
+	self.scrollSpeed = -8;
+	self.update = function () {
+		self.x += self.scrollSpeed;
+	};
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.velocityY = 0;
+	self.onGround = false;
+	self.jumpPower = -25;
+	self.gravity = 1.2;
+	self.groundY = 2400;
+	self.jump = function () {
+		if (self.onGround) {
+			self.velocityY = self.jumpPower;
+			self.onGround = false;
+			LK.getSound('jump').play();
+		}
+	};
+	self.update = function () {
+		// Apply gravity
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		// Ground collision
+		if (self.y >= self.groundY) {
+			self.y = self.groundY;
+			self.velocityY = 0;
+			self.onGround = true;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var player;
+var obstacles = [];
+var grounds = [];
+var currentLevel = 1;
+var gameRunning = false;
+var levelStartX = 0;
+var nextObstacleX = 2500;
+// Level data - obstacles defined as [type, xOffset, yOffset]
+var levelData = {
+	1: [['spike', 2500, 2400], ['spike', 2800, 2400], ['block', 3200, 2320], ['spike', 3600, 2400], ['spike', 4000, 2400], ['block', 4400, 2240], ['spike', 4800, 2400], ['block', 5200, 2320], ['spike', 5600, 2400]],
+	2: [['spike', 2500, 2400], ['block', 2800, 2320], ['spike', 3000, 2400], ['block', 3400, 2240], ['block', 3600, 2320], ['spike', 4000, 2400], ['spike', 4200, 2400], ['block', 4600, 2160], ['spike', 5000, 2400], ['block', 5400, 2320], ['spike', 5800, 2400]],
+	3: [['spike', 2500, 2400], ['block', 2700, 2320], ['spike', 2900, 2400], ['block', 3200, 2240], ['spike', 3500, 2400], ['block', 3700, 2160], ['spike', 4000, 2400], ['spike', 4200, 2400], ['block', 4500, 2320], ['block', 4700, 2240], ['spike', 5100, 2400], ['block', 5400, 2160], ['spike', 5800, 2400]]
+};
+// UI Elements
+var levelText = new Text2('Level 1', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+levelText.anchor.set(0.5, 0);
+LK.gui.top.addChild(levelText);
+levelText.y = 100;
+function initializeLevel() {
+	// Clear existing obstacles and grounds
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		obstacles[i].destroy();
+		obstacles.splice(i, 1);
+	}
+	for (var j = grounds.length - 1; j >= 0; j--) {
+		grounds[j].destroy();
+		grounds.splice(j, 1);
+	}
+	// Create player
+	if (player) {
+		player.destroy();
+	}
+	player = game.addChild(new Player());
+	player.x = 300;
+	player.y = 2400;
+	// Create ground tiles
+	for (var g = 0; g < 80; g++) {
+		var ground = game.addChild(new Ground(g * 100));
+		grounds.push(ground);
+	}
+	// Create obstacles for current level
+	var levelObstacles = levelData[currentLevel];
+	if (levelObstacles) {
+		for (var o = 0; o < levelObstacles.length; o++) {
+			var obstacleData = levelObstacles[o];
+			var obstacle = game.addChild(new Obstacle(obstacleData[0], obstacleData[1], obstacleData[2]));
+			obstacles.push(obstacle);
+		}
+	}
+	gameRunning = true;
+	levelText.setText('Level ' + currentLevel);
+}
+function restartLevel() {
+	LK.getSound('death').play();
+	LK.effects.flashScreen(0xFF0000, 500);
+	LK.setTimeout(function () {
+		initializeLevel();
+	}, 600);
+}
+function nextLevel() {
+	currentLevel++;
+	if (currentLevel > 3) {
+		LK.showYouWin();
+		return;
+	}
+	LK.setTimeout(function () {
+		initializeLevel();
+	}, 1000);
+}
+function checkLevelComplete() {
+	var furthestObstacle = 0;
+	for (var i = 0; i < obstacles.length; i++) {
+		if (obstacles[i].x > furthestObstacle) {
+			furthestObstacle = obstacles[i].x;
+		}
+	}
+	// If player has passed all obstacles
+	if (player.x > furthestObstacle + 200) {
+		gameRunning = false;
+		nextLevel();
+	}
+}
+// Initialize first level
+initializeLevel();
+game.down = function (x, y, obj) {
+	if (gameRunning && player) {
+		player.jump();
+	}
+};
+game.update = function () {
+	if (!gameRunning) return;
+	// Check for collisions
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		if (player.intersects(obstacle)) {
+			gameRunning = false;
+			restartLevel();
+			return;
+		}
+		// Remove obstacles that are off screen
+		if (obstacle.x < -200) {
+			obstacle.destroy();
+			obstacles.splice(i, 1);
+		}
+	}
+	// Remove ground tiles that are off screen and add new ones
+	for (var j = grounds.length - 1; j >= 0; j--) {
+		var ground = grounds[j];
+		if (ground.x < -200) {
+			ground.destroy();
+			grounds.splice(j, 1);
+		}
+	}
+	// Add new ground tiles as needed
+	while (grounds.length < 80) {
+		var lastGround = grounds[grounds.length - 1];
+		var newX = lastGround ? lastGround.x + 100 : 7800;
+		var newGround = game.addChild(new Ground(newX));
+		grounds.push(newGround);
+	}
+	checkLevelComplete();
+};
\ No newline at end of file