===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,250 @@
-/****
+/**** 
+* 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 update
+	self.update = function () {
+		self.vy += gravity;
+		self.y += self.vy;
+		// Clamp rotation for visual feedback
+		var maxAngle = Math.PI / 4;
+		var minAngle = -Math.PI / 2.5;
+		var t = Math.max(-1, Math.min(1, self.vy / 30));
+		birdSprite.rotation = t * maxAngle;
+		if (birdSprite.rotation < minAngle) birdSprite.rotation = minAngle;
+		if (birdSprite.rotation > maxAngle) birdSprite.rotation = maxAngle;
+	};
+	// Flap (jump)
+	self.flap = function () {
+		self.vy = flapStrength;
+		LK.getSound('flap').play();
+	};
+	return self;
+});
+// PipePair class (top and bottom pipes)
+var PipePair = Container.expand(function () {
+	var self = Container.call(this);
+	// Top pipe
+	self.topPipe = self.attachAsset('pipe', {
+		anchorX: 0,
+		anchorY: 1
+	});
+	// Bottom pipe
+	self.bottomPipe = self.attachAsset('pipe', {
+		anchorX: 0,
+		anchorY: 0
+	});
+	// Used for scoring
+	self.passed = false;
+	// Set gap and position
+	self.setGap = function (gapY, gapHeight) {
+		// Top pipe: bottom at gapY - gapHeight/2
+		self.topPipe.height = Math.max(100, gapY - gapHeight / 2);
+		self.topPipe.y = self.topPipe.height;
+		// Bottom pipe: top at gapY + gapHeight/2
+		self.bottomPipe.y = gapY + gapHeight / 2;
+		self.bottomPipe.height = Math.max(100, 2732 - self.bottomPipe.y - groundHeight);
+	};
+	// Move pipes left
+	self.update = function () {
+		self.x -= pipeSpeed;
+	};
+	// Get bounding rectangles for collision
+	self.getTopRect = function () {
+		return new Rectangle(self.x, 0, self.topPipe.width, self.topPipe.height);
+	};
+	self.getBottomRect = function () {
+		return new Rectangle(self.x, self.bottomPipe.y, self.bottomPipe.width, self.bottomPipe.height);
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87ceeb // Sky blue
+});
+
+/**** 
+* Game Code
+****/ 
+// Sound: Hit
+// Sound: Score
+// Sound: Flap
+// Ground: brown box
+// Pipe: green box
+// Bird: yellow ellipse
+// Constants
+var gravity = 1.6;
+var flapStrength = -28;
+var pipeSpeed = 16;
+var pipeInterval = 110; // frames between pipes
+var pipeGap = 520; // vertical gap between pipes
+var groundHeight = 120;
+var birdStartX = 600;
+var birdStartY = 1200;
+// Game state
+var bird;
+var pipes = [];
+var score = 0;
+var scoreTxt;
+var ground;
+var gameStarted = false;
+var gameOver = false;
+var lastPipeFrame = 0;
+// GUI Score
+scoreTxt = new Text2('0', {
+	size: 180,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Add ground
+ground = LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: 2732 - groundHeight
+});
+game.addChild(ground);
+// Add bird
+bird = new Bird();
+bird.x = birdStartX;
+bird.y = birdStartY;
+game.addChild(bird);
+// Reset function
+function resetGame() {
+	// Remove pipes
+	for (var i = 0; i < pipes.length; i++) {
+		pipes[i].destroy();
+	}
+	pipes = [];
+	// Reset bird
+	bird.x = birdStartX;
+	bird.y = birdStartY;
+	bird.vy = 0;
+	// Reset score
+	score = 0;
+	scoreTxt.setText(score);
+	// Reset state
+	gameStarted = false;
+	gameOver = false;
+	lastPipeFrame = LK.ticks;
+}
+// Start game on first tap
+function startGame() {
+	if (!gameStarted && !gameOver) {
+		gameStarted = true;
+		bird.flap();
+	}
+}
+// Flap on tap
+game.down = function (x, y, obj) {
+	if (gameOver) return;
+	if (!gameStarted) {
+		startGame();
+		return;
+	}
+	bird.flap();
+};
+// Main update loop
+game.update = function () {
+	if (gameOver) return;
+	// Bird physics
+	if (gameStarted) {
+		bird.update();
+	}
+	// Pipes
+	if (gameStarted) {
+		// Spawn pipes
+		if (LK.ticks - lastPipeFrame >= pipeInterval) {
+			var gapY = 400 + Math.floor(Math.random() * (2732 - groundHeight - 800));
+			var pair = new PipePair();
+			pair.x = 2048;
+			pair.setGap(gapY, pipeGap);
+			pipes.push(pair);
+			game.addChild(pair);
+			lastPipeFrame = LK.ticks;
+		}
+	}
+	// Update pipes and check for collisions
+	for (var i = pipes.length - 1; i >= 0; i--) {
+		var pair = pipes[i];
+		if (gameStarted) {
+			pair.update();
+		}
+		// Remove pipes off screen
+		if (pair.x + pair.topPipe.width < 0) {
+			pair.destroy();
+			pipes.splice(i, 1);
+			continue;
+		}
+		// Score: passed pipe
+		if (!pair.passed && pair.x + pair.topPipe.width < bird.x) {
+			pair.passed = true;
+			score += 1;
+			scoreTxt.setText(score);
+			LK.getSound('score').play();
+		}
+		// Collision detection
+		if (rectIntersectsCircle(pair.getTopRect(), bird.x, bird.y, birdWidth() / 2) || rectIntersectsCircle(pair.getBottomRect(), bird.x, bird.y, birdWidth() / 2)) {
+			triggerGameOver();
+			return;
+		}
+	}
+	// Ground collision
+	if (bird.y + birdHeight() / 2 >= 2732 - groundHeight) {
+		bird.y = 2732 - groundHeight - birdHeight() / 2;
+		triggerGameOver();
+		return;
+	}
+	// Ceiling clamp
+	if (bird.y - birdHeight() / 2 < 0) {
+		bird.y = birdHeight() / 2;
+		bird.vy = 0;
+	}
+};
+// Helper: get bird width/height
+function birdWidth() {
+	return bird.children[0].width;
+}
+function birdHeight() {
+	return bird.children[0].height;
+}
+// Rectangle-circle collision
+function rectIntersectsCircle(rect, cx, cy, cr) {
+	// Find closest point to circle center within the rectangle
+	var closestX = Math.max(rect.x, Math.min(cx, rect.x + rect.width));
+	var closestY = Math.max(rect.y, Math.min(cy, rect.y + rect.height));
+	// Calculate distance
+	var dx = cx - closestX;
+	var dy = cy - closestY;
+	return dx * dx + dy * dy < cr * cr;
+}
+// Game over
+function triggerGameOver() {
+	if (gameOver) return;
+	gameOver = true;
+	LK.getSound('hit').play();
+	LK.effects.flashScreen(0xff0000, 600);
+	LK.showGameOver();
+}
+// Reset on game over
+LK.on('gameover', function () {
+	resetGame();
+});
+// Initial reset
+resetGame();
\ No newline at end of file