===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,177 @@
-/****
+/**** 
+* Classes
+****/ 
+var Bird = Container.expand(function () {
+	var self = Container.call(this);
+	var birdGraphics = self.attachAsset('bird', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.velocity = 0;
+	self.gravity = 0.8;
+	self.flapPower = -12;
+	self.rotation = 0;
+	self.flap = function () {
+		self.velocity = self.flapPower;
+		LK.getSound('flap').play();
+	};
+	self.update = function () {
+		self.velocity += self.gravity;
+		self.y += self.velocity;
+		// Rotate bird based on velocity
+		self.rotation = Math.min(Math.max(self.velocity * 0.05, -0.5), 1.2);
+		birdGraphics.rotation = self.rotation;
+		// Check ground collision
+		if (self.y > 2732 - 150) {
+			self.y = 2732 - 150;
+			gameOver = true;
+		}
+		// Check ceiling collision
+		if (self.y < 50) {
+			self.y = 50;
+			gameOver = true;
+		}
+	};
+	return self;
+});
+var Pipe = Container.expand(function () {
+	var self = Container.call(this);
+	self.gapSize = 300;
+	self.speed = -4;
+	self.scored = false;
+	// Create top pipe
+	self.topPipe = self.attachAsset('pipe', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	// Create bottom pipe
+	self.bottomPipe = self.attachAsset('pipe', {
+		anchorX: 0.5,
+		anchorY: 0
+	});
+	self.setGapPosition = function (gapY) {
+		self.topPipe.y = gapY - self.gapSize / 2;
+		self.bottomPipe.y = gapY + self.gapSize / 2;
+	};
+	self.update = function () {
+		self.x += self.speed;
+		// Check if bird passed through pipe
+		if (!self.scored && self.x < bird.x) {
+			self.scored = true;
+			LK.setScore(LK.getScore() + 1);
+			scoreTxt.setText(LK.getScore());
+			LK.getSound('score').play();
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var bird;
+var pipes = [];
+var ground;
+var scoreTxt;
+var gameOver = false;
+var gameStarted = false;
+var pipeSpawnTimer = 0;
+var pipeSpawnInterval = 90; // frames between pipe spawns
+// Create ground
+ground = game.addChild(LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 1,
+	x: 0,
+	y: 2732
+}));
+// Create bird
+bird = game.addChild(new Bird());
+bird.x = 300;
+bird.y = 2732 / 2;
+// Create score text
+scoreTxt = new Text2('0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+scoreTxt.y = 100;
+// Create instruction text
+var instructionTxt = new Text2('TAP TO START', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+instructionTxt.anchor.set(0.5, 0.5);
+LK.gui.center.addChild(instructionTxt);
+function spawnPipe() {
+	var pipe = new Pipe();
+	pipe.x = 2048 + 60;
+	// Random gap position between 200 and 2532 (accounting for gap size)
+	var gapY = 200 + Math.random() * (2532 - 400);
+	pipe.setGapPosition(gapY);
+	pipes.push(pipe);
+	game.addChild(pipe);
+}
+function checkCollisions() {
+	for (var i = 0; i < pipes.length; i++) {
+		var pipe = pipes[i];
+		// Check collision with top pipe
+		if (bird.intersects(pipe.topPipe)) {
+			gameOver = true;
+			LK.getSound('hit').play();
+			return;
+		}
+		// Check collision with bottom pipe  
+		if (bird.intersects(pipe.bottomPipe)) {
+			gameOver = true;
+			LK.getSound('hit').play();
+			return;
+		}
+	}
+}
+function cleanupPipes() {
+	for (var i = pipes.length - 1; i >= 0; i--) {
+		var pipe = pipes[i];
+		if (pipe.x < -100) {
+			pipe.destroy();
+			pipes.splice(i, 1);
+		}
+	}
+}
+game.down = function (x, y, obj) {
+	if (gameOver) {
+		return;
+	}
+	if (!gameStarted) {
+		gameStarted = true;
+		instructionTxt.visible = false;
+	}
+	bird.flap();
+};
+game.update = function () {
+	if (gameOver) {
+		LK.showGameOver();
+		return;
+	}
+	if (!gameStarted) {
+		return;
+	}
+	// Update bird
+	// Spawn pipes
+	pipeSpawnTimer++;
+	if (pipeSpawnTimer >= pipeSpawnInterval) {
+		spawnPipe();
+		pipeSpawnTimer = 0;
+	}
+	// Check collisions
+	checkCollisions();
+	// Cleanup off-screen pipes
+	cleanupPipes();
+};
\ No newline at end of file