===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,180 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	self.topPipe = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.bottomPipe = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -4;
+	self.gapSize = 280;
+	self.gapPosition = 0;
+	self.scored = false;
+	self.setGapPosition = function (gapPos) {
+		self.gapPosition = gapPos;
+		var topHeight = self.gapPosition;
+		var bottomHeight = 2732 - self.gapPosition - self.gapSize;
+		self.topPipe.y = topHeight / 2;
+		self.topPipe.height = topHeight;
+		self.bottomPipe.y = self.gapPosition + self.gapSize + bottomHeight / 2;
+		self.bottomPipe.height = bottomHeight;
+	};
+	self.update = function () {
+		self.x += self.speed;
+	};
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.velocityY = 0;
+	self.gravity = 0.6;
+	self.flapPower = -12;
+	self.maxVelocity = 15;
+	self.flap = function () {
+		self.velocityY = self.flapPower;
+		LK.getSound('flap').play();
+	};
+	self.update = function () {
+		self.velocityY += self.gravity;
+		if (self.velocityY > self.maxVelocity) {
+			self.velocityY = self.maxVelocity;
+		}
+		self.y += self.velocityY;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var player = game.addChild(new Player());
+player.x = 400;
+player.y = 1366;
+var obstacles = [];
+var score = 0;
+var gameActive = true;
+var spawnTimer = 0;
+var obstacleSpeed = -4;
+var difficultyTimer = 0;
+var minGapSize = 240;
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: 0x000000
+});
+scoreTxt.anchor.set(0.5, 0);
+scoreTxt.x = 1024;
+scoreTxt.y = 100;
+LK.gui.top.addChild(scoreTxt);
+function updateScore() {
+	scoreTxt.setText(score);
+	LK.setScore(score);
+}
+function spawnObstacle() {
+	var obstacle = game.addChild(new Obstacle());
+	obstacle.x = 2200;
+	obstacle.speed = obstacleSpeed;
+	var minGap = Math.max(minGapSize, 240 - Math.floor(score / 10) * 10);
+	var gapPos = Math.random() * (2732 - minGap - 200) + 100;
+	obstacle.gapPosition = gapPos;
+	obstacle.gapSize = minGap;
+	obstacle.setGapPosition(gapPos);
+	obstacles.push(obstacle);
+}
+function checkCollision(rect1X, rect1Y, rect1W, rect1H, rect2X, rect2Y, rect2W, rect2H) {
+	return rect1X - rect1W / 2 < rect2X + rect2W / 2 && rect1X + rect1W / 2 > rect2X - rect2W / 2 && rect1Y - rect1H / 2 < rect2Y + rect2H / 2 && rect1Y + rect1H / 2 > rect2Y - rect2H / 2;
+}
+function endGame() {
+	gameActive = false;
+	LK.showGameOver();
+}
+game.down = function (x, y, obj) {
+	if (gameActive) {
+		player.flap();
+	}
+};
+game.move = function (x, y, obj) {
+	// Not used for this game
+};
+game.update = function () {
+	if (!gameActive) {
+		return;
+	}
+	// Update player
+	player.update();
+	// Check if player hit top or bottom
+	if (player.y - 40 < 0 || player.y + 40 > 2732) {
+		endGame();
+		return;
+	}
+	// Spawn obstacles
+	spawnTimer++;
+	if (spawnTimer > 120) {
+		spawnObstacle();
+		spawnTimer = 0;
+	}
+	// Update obstacles and check collisions
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		obstacle.update();
+		// Check if obstacle is off screen
+		if (obstacle.x + 100 < 0) {
+			obstacle.destroy();
+			obstacles.splice(i, 1);
+			continue;
+		}
+		// Check if player passed obstacle for scoring
+		if (!obstacle.scored && obstacle.x + 75 < player.x) {
+			obstacle.scored = true;
+			score++;
+			updateScore();
+			LK.getSound('score').play();
+		}
+		// Check collision with top pipe
+		var topPipeHeight = obstacle.gapPosition;
+		if (checkCollision(player.x, player.y, 80, 80, obstacle.x, topPipeHeight / 2, 150, topPipeHeight)) {
+			endGame();
+			return;
+		}
+		// Check collision with bottom pipe
+		var bottomPipeY = obstacle.gapPosition + obstacle.gapSize + (2732 - obstacle.gapPosition - obstacle.gapSize) / 2;
+		var bottomPipeHeight = 2732 - obstacle.gapPosition - obstacle.gapSize;
+		if (checkCollision(player.x, player.y, 80, 80, obstacle.x, bottomPipeY, 150, bottomPipeHeight)) {
+			endGame();
+			return;
+		}
+	}
+	// Increase difficulty over time
+	difficultyTimer++;
+	if (difficultyTimer > 600) {
+		if (obstacleSpeed > -6.5) {
+			obstacleSpeed -= 0.3;
+		}
+		difficultyTimer = 0;
+	}
+};
+// Start game music
+LK.playMusic('bgmusic', {
+	loop: true
+});
+updateScore();
\ No newline at end of file