===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,228 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+var storage = LK.import("@upit/storage.v1");
+
+/**** 
+* Classes
+****/ 
+var Bird = Container.expand(function () {
+	var self = Container.call(this);
+	var birdGraphics = self.attachAsset('bird', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.isFlipped = false;
+	self.baseY = 1366; // Middle of screen (2732 / 2)
+	self.flippedY = 683; // Upper third
+	self.velocity = 0;
+	self.gravity = 0.4;
+	self.maxVelocity = 15;
+	self.flip = function () {
+		self.isFlipped = !self.isFlipped;
+		var targetY = self.isFlipped ? self.flippedY : self.baseY;
+		tween(self, {
+			y: targetY
+		}, {
+			duration: 200,
+			easing: tween.easeInOut
+		});
+		LK.getSound('flip').play();
+	};
+	self.update = function () {
+		if (!self.isFlipped) {
+			self.velocity += self.gravity;
+			if (self.velocity > self.maxVelocity) {
+				self.velocity = self.maxVelocity;
+			}
+		} else {
+			self.velocity -= self.gravity;
+			if (self.velocity < -self.maxVelocity) {
+				self.velocity = -self.maxVelocity;
+			}
+		}
+		self.y += self.velocity;
+		// Boundary check
+		if (self.y < 30) {
+			self.y = 30;
+			self.velocity = 0;
+		}
+		if (self.y > 2702) {
+			self.y = 2702;
+			self.velocity = 0;
+		}
+	};
+	return self;
+});
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	self.speed = 8;
+	self.gapSize = 300;
+	self.gapPosition = 0; // 0 = top, 1 = middle, 2 = bottom
+	var topPart = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var bottomPart = LK.getAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.addChild(bottomPart);
+	self.setupObstacle = function (position) {
+		self.gapPosition = position;
+		var obstacleHeight = 200;
+		var screenHeight = 2732;
+		var gapSize = self.gapSize;
+		var totalHeight = screenHeight - gapSize;
+		if (position === 0) {
+			// Gap at top
+			topPart.y = -gapSize / 2 - obstacleHeight / 2;
+			bottomPart.y = gapSize / 2 + obstacleHeight / 2;
+		} else if (position === 1) {
+			// Gap in middle
+			topPart.y = -(gapSize / 2 + obstacleHeight / 2);
+			bottomPart.y = gapSize / 2 + obstacleHeight / 2;
+		} else {
+			// Gap at bottom
+			topPart.y = -gapSize / 2 - obstacleHeight / 2;
+			bottomPart.y = screenHeight - gapSize / 2 + obstacleHeight / 2;
+		}
+	};
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var bird = game.addChild(new Bird());
+bird.x = 300;
+bird.y = bird.baseY;
+var obstacles = [];
+var score = 0;
+var gameActive = true;
+var obstacleSpawnRate = 80;
+var spawnCounter = 0;
+var difficulty = 1;
+var difficultyIncrement = 0.0002;
+var scoreTxt = new Text2('0', {
+	size: 100,
+	fill: 0x000000
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+function updateScore() {
+	scoreTxt.setText(score);
+	LK.setScore(score);
+}
+function spawnObstacle() {
+	var obstacle = game.addChild(new Obstacle());
+	obstacle.x = 2048 + 200;
+	obstacle.y = 1366;
+	var positions = [0, 1, 2];
+	var randomPosition = positions[Math.floor(Math.random() * positions.length)];
+	obstacle.setupObstacle(randomPosition);
+	obstacle.passed = false;
+	obstacles.push(obstacle);
+}
+function endGame() {
+	gameActive = false;
+	LK.effects.flashScreen(0xFF0000, 500);
+	LK.getSound('hit').play();
+	LK.setTimeout(function () {
+		LK.showGameOver();
+	}, 500);
+}
+game.down = function (x, y, obj) {
+	if (gameActive) {
+		bird.flip();
+	}
+};
+game.move = function (x, y, obj) {
+	// Empty move handler required for touch compatibility
+};
+game.up = function (x, y, obj) {
+	// Empty up handler
+};
+game.update = function () {
+	if (!gameActive) {
+		return;
+	}
+	// Update difficulty
+	difficulty += difficultyIncrement;
+	obstacleSpawnRate = Math.max(40, 80 - Math.floor(difficulty * 5));
+	// Update bird
+	bird.update();
+	// Spawn obstacles
+	spawnCounter++;
+	if (spawnCounter >= obstacleSpawnRate) {
+		spawnObstacle();
+		spawnCounter = 0;
+	}
+	// Update obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		obstacle.speed = 8 + difficulty * 0.5;
+		obstacle.update();
+		// Check if bird passed obstacle
+		if (!obstacle.passed && bird.x > obstacle.x) {
+			obstacle.passed = true;
+			score++;
+			updateScore();
+			LK.getSound('score').play();
+			// Win condition
+			if (score >= 50) {
+				gameActive = false;
+				LK.effects.flashScreen(0x00FF00, 500);
+				LK.setTimeout(function () {
+					LK.showYouWin();
+				}, 500);
+				return;
+			}
+		}
+		// Check collision with bird
+		var birdRadius = 30;
+		var obstacleWidth = 80;
+		var gapSize = obstacle.gapSize;
+		var obstacleHeight = 200;
+		var birdLeft = bird.x - birdRadius;
+		var birdRight = bird.x + birdRadius;
+		var birdTop = bird.y - birdRadius;
+		var birdBottom = bird.y + birdRadius;
+		var obstacleLeft = obstacle.x - obstacleWidth / 2;
+		var obstacleRight = obstacle.x + obstacleWidth / 2;
+		if (birdRight > obstacleLeft && birdLeft < obstacleRight) {
+			// Check vertical collision
+			var gapCenter = obstacle.y;
+			var gapTop = gapCenter - gapSize / 2;
+			var gapBottom = gapCenter + gapSize / 2;
+			if (birdTop < gapTop || birdBottom > gapBottom) {
+				endGame();
+				return;
+			}
+		}
+		// Remove off-screen obstacles
+		if (obstacle.x < -200) {
+			obstacle.destroy();
+			obstacles.splice(i, 1);
+		}
+	}
+	// Boundary collision
+	if (bird.y - 30 <= 0 || bird.y + 30 >= 2732) {
+		endGame();
+		return;
+	}
+};
+LK.playMusic('bgmusic', {
+	loop: true
 });
\ No newline at end of file