===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,179 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Bird = Container.expand(function () {
+	var self = Container.call(this);
+	var birdGraphics = self.attachAsset('bird', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.velocityY = 0;
+	self.gravity = 0.6;
+	self.flapPower = -15;
+	self.isAlive = true;
+	self.flap = function () {
+		self.velocityY = self.flapPower;
+		LK.getSound('flap').play();
+	};
+	self.update = function () {
+		if (!self.isAlive) return;
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		// Rotate bird based on velocity
+		if (self.velocityY > 0) {
+			birdGraphics.rotation = Math.min(self.velocityY * 0.05, 0.5);
+		} else {
+			birdGraphics.rotation = Math.max(self.velocityY * 0.05, -0.5);
+		}
+		// Ceiling collision
+		if (self.y < 50) {
+			self.y = 50;
+			self.velocityY = 0;
+			self.isAlive = false;
+		}
+		// Ground collision
+		if (self.y > 2582) {
+			self.y = 2582;
+			self.velocityY = 0;
+			self.isAlive = false;
+		}
+	};
+	return self;
+});
+var Pipe = Container.expand(function () {
+	var self = Container.call(this);
+	self.speed = -8;
+	self.gapHeight = 300;
+	self.minGapY = 200;
+	self.maxGapY = 1800;
+	self.scored = false;
+	// Generate random gap position
+	var gapY = Math.random() * (self.maxGapY - self.minGapY) + self.minGapY;
+	// Top pipe
+	var topPipe = self.attachAsset('pipeTop', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	topPipe.x = 75;
+	topPipe.y = gapY;
+	// Bottom pipe
+	var bottomPipe = self.attachAsset('pipeBottom', {
+		anchorX: 0.5,
+		anchorY: 0
+	});
+	bottomPipe.x = 75;
+	bottomPipe.y = gapY + self.gapHeight;
+	self.update = function () {
+		self.x += self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var bird = game.addChild(new Bird());
+bird.x = 300;
+bird.y = 1366;
+var pipes = [];
+var score = 0;
+var gameOver = false;
+var pipeSpawnCounter = 0;
+var pipeSpawnInterval = 120;
+var scoreTxt = new Text2('0', {
+	size: 150,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+var ground = game.addChild(LK.getAsset('ground', {
+	anchorX: 0.5,
+	anchorY: 0.5
+}));
+ground.x = 1024;
+ground.y = 2650;
+// Game input handler
+game.down = function (x, y, obj) {
+	if (!gameOver && bird.isAlive) {
+		bird.flap();
+	}
+};
+game.update = function () {
+	if (!gameOver) {
+		bird.update();
+		// Spawn pipes
+		pipeSpawnCounter++;
+		if (pipeSpawnCounter >= pipeSpawnInterval) {
+			var newPipe = new Pipe();
+			newPipe.x = 2200;
+			newPipe.y = 0;
+			pipes.push(newPipe);
+			game.addChild(newPipe);
+			pipeSpawnCounter = 0;
+		}
+		// Update and check pipes
+		for (var i = pipes.length - 1; i >= 0; i--) {
+			var pipe = pipes[i];
+			pipe.update();
+			// Remove off-screen pipes
+			if (pipe.x < -200) {
+				pipe.destroy();
+				pipes.splice(i, 1);
+				continue;
+			}
+			// Check collision with bird
+			var topPipe = pipe.children[0];
+			var bottomPipe = pipe.children[1];
+			if (bird.intersects(topPipe) || bird.intersects(bottomPipe)) {
+				if (bird.isAlive) {
+					bird.isAlive = false;
+					LK.getSound('hit').play();
+					LK.effects.flashScreen(0xFF0000, 500);
+					gameOver = true;
+					LK.setTimeout(function () {
+						LK.showGameOver();
+					}, 600);
+				}
+			}
+			// Award score when pipe is passed
+			if (!pipe.scored && pipe.x < bird.x && pipe.x + 150 > bird.x - 40) {
+				pipe.scored = true;
+				score++;
+				LK.setScore(score);
+				scoreTxt.setText(score.toString());
+				LK.getSound('score').play();
+				// Win condition at score 50
+				if (score >= 50) {
+					gameOver = true;
+					LK.setTimeout(function () {
+						LK.showYouWin();
+					}, 300);
+				}
+			}
+		}
+		// Ground collision
+		if (bird.intersects(ground)) {
+			if (bird.isAlive) {
+				bird.isAlive = false;
+				LK.getSound('hit').play();
+				LK.effects.flashScreen(0xFF0000, 500);
+				gameOver = true;
+				LK.setTimeout(function () {
+					LK.showGameOver();
+				}, 600);
+			}
+		}
+	}
+};
\ No newline at end of file