===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,246 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Bird class
+var Bird = Container.expand(function () {
+	var self = Container.call(this);
+	var birdSprite = self.attachAsset('bird', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.vy = 0; // vertical velocity
+	// Bird physics constants
+	self.gravity = 2.2; // px per frame^2
+	self.flapStrength = -38; // px per frame
+	// Flap method
+	self.flap = function () {
+		self.vy = self.flapStrength;
+		// Animate a quick scale for feedback
+		tween(birdSprite, {
+			scaleY: 0.7
+		}, {
+			duration: 60,
+			easing: tween.cubicOut,
+			onFinish: function onFinish() {
+				tween(birdSprite, {
+					scaleY: 1
+				}, {
+					duration: 120,
+					easing: tween.cubicOut
+				});
+			}
+		});
+	};
+	// Update method
+	self.update = function () {
+		self.vy += self.gravity;
+		self.y += self.vy;
+		// Clamp rotation for visual feedback
+		var maxAngle = Math.PI / 4;
+		var minAngle = -Math.PI / 6;
+		var angle = self.vy / 40 * maxAngle;
+		if (angle > maxAngle) angle = maxAngle;
+		if (angle < minAngle) angle = minAngle;
+		birdSprite.rotation = angle;
+	};
+	return self;
+});
+// PipePair class (top and bottom pipes)
+var PipePair = Container.expand(function () {
+	var self = Container.call(this);
+	// Pipe gap size and min/max Y for gap center
+	self.gap = 420;
+	self.pipeWidth = 200;
+	self.pipeHeight = 900;
+	// Top pipe
+	self.topPipe = self.attachAsset('pipe', {
+		anchorX: 0.5,
+		anchorY: 1,
+		width: self.pipeWidth,
+		height: self.pipeHeight
+	});
+	// Bottom pipe
+	self.bottomPipe = self.attachAsset('pipe', {
+		anchorX: 0.5,
+		anchorY: 0,
+		width: self.pipeWidth,
+		height: self.pipeHeight
+	});
+	// Set pipes' positions based on gapY
+	self.setGapY = function (gapY) {
+		self.topPipe.y = gapY - self.gap / 2;
+		self.bottomPipe.y = gapY + self.gap / 2;
+	};
+	// For scoring
+	self.passed = false;
+	// Update method
+	self.update = function () {
+		self.x -= pipeSpeed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x87ceeb // Sky blue
+});
+
+/**** 
+* Game Code
+****/ 
+// Ground: brown box
+// Pipe: green box
+// Bird: yellow ellipse
+// Game constants
+var BIRD_START_X = 600;
+var BIRD_START_Y = 1200;
+var GROUND_Y = 2732 - 60; // ground height is 120, anchorY=0
+var PIPE_INTERVAL = 105; // frames between pipes (~1.75s at 60fps)
+var PIPE_MIN_Y = 500;
+var PIPE_MAX_Y = 2732 - 500 - 420; // leave space for gap and ground
+var pipeSpeed = 16; // px per frame, increases with score
+// Game state
+var bird;
+var pipes = [];
+var ground;
+var score = 0;
+var scoreTxt;
+var lastPipeTick = 0;
+var gameStarted = false;
+var gameOver = false;
+// Add ground
+ground = LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: GROUND_Y
+});
+game.addChild(ground);
+// Add score text to GUI
+scoreTxt = new Text2('0', {
+	size: 160,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Add bird
+bird = new Bird();
+bird.x = BIRD_START_X;
+bird.y = BIRD_START_Y;
+game.addChild(bird);
+// Start game on first tap
+function startGame() {
+	if (!gameStarted) {
+		gameStarted = true;
+		score = 0;
+		LK.setScore(0);
+		scoreTxt.setText('0');
+		// Remove old pipes
+		for (var i = 0; i < pipes.length; i++) {
+			pipes[i].destroy();
+		}
+		pipes = [];
+		// Reset bird
+		bird.x = BIRD_START_X;
+		bird.y = BIRD_START_Y;
+		bird.vy = 0;
+		pipeSpeed = 16;
+		lastPipeTick = LK.ticks;
+		gameOver = false;
+	}
+}
+// Flap on tap
+game.down = function (x, y, obj) {
+	if (gameOver) return;
+	if (!gameStarted) {
+		startGame();
+	}
+	bird.flap();
+};
+// Main update loop
+game.update = function () {
+	if (!gameStarted || gameOver) return;
+	// Bird physics
+	bird.update();
+	// Clamp bird to top of screen
+	if (bird.y < 0) bird.y = 0;
+	// Pipes
+	for (var i = pipes.length - 1; i >= 0; i--) {
+		var pipePair = pipes[i];
+		pipePair.update();
+		// Remove pipes off screen
+		if (pipePair.x < -pipePair.pipeWidth) {
+			pipePair.destroy();
+			pipes.splice(i, 1);
+			continue;
+		}
+		// Scoring: passed center of pipes
+		if (!pipePair.passed && bird.x > pipePair.x + pipePair.pipeWidth / 2) {
+			pipePair.passed = true;
+			score += 1;
+			LK.setScore(score);
+			scoreTxt.setText(score + '');
+			// Increase speed every 10 points
+			if (score % 10 === 0) {
+				pipeSpeed += 2;
+			}
+		}
+		// Collision detection
+		// Top pipe
+		if (bird.intersects(pipePair.topPipe) || bird.intersects(pipePair.bottomPipe)) {
+			endGame();
+			return;
+		}
+	}
+	// Add new pipes
+	if (LK.ticks - lastPipeTick > PIPE_INTERVAL) {
+		var gapY = PIPE_MIN_Y + Math.floor(Math.random() * (PIPE_MAX_Y - PIPE_MIN_Y));
+		var pipePair = new PipePair();
+		pipePair.x = 2048 + 200; // start just off right edge
+		pipePair.setGapY(gapY);
+		pipes.push(pipePair);
+		game.addChild(pipePair);
+		lastPipeTick = LK.ticks;
+	}
+	// Ground collision
+	if (bird.y + bird.height / 2 > GROUND_Y) {
+		bird.y = GROUND_Y - bird.height / 2;
+		endGame();
+		return;
+	}
+};
+// End game
+function endGame() {
+	if (gameOver) return;
+	gameOver = true;
+	// Flash red
+	LK.effects.flashScreen(0xff0000, 600);
+	// Show game over popup (handled by LK)
+	LK.showGameOver();
+}
+// Reset on game over (handled by LK engine, but for safety)
+game.onGameOver = function () {
+	gameStarted = false;
+	gameOver = false;
+	score = 0;
+	LK.setScore(0);
+	scoreTxt.setText('0');
+	// Remove pipes
+	for (var i = 0; i < pipes.length; i++) {
+		pipes[i].destroy();
+	}
+	pipes = [];
+	// Reset bird
+	bird.x = BIRD_START_X;
+	bird.y = BIRD_START_Y;
+	bird.vy = 0;
+	pipeSpeed = 16;
+	lastPipeTick = LK.ticks;
+};
\ No newline at end of file