/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	highScore: 0
});

/**** 
* Classes
****/ 
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocity = 0;
	self.gravity = 0.5;
	self.flapStrength = -10;
	self.dead = false;
	self.flap = function () {
		// Animate wing flapping
		tween(birdGraphics, {
			scaleY: 0.8
		}, {
			duration: 100,
			yoyo: true,
			repeat: 1,
			easing: tween.easeInOut
		});
		if (!self.dead) {
			self.velocity = self.flapStrength;
			LK.getSound('flap').play();
			// Rotate bird upward when flapping
			tween(self, {
				rotation: -0.5
			}, {
				duration: 200,
				easing: tween.easeOut
			});
		}
	};
	self.update = function () {
		if (!self.dead) {
			// Add bobbing effect when idle
			if (!gameStarted) {
				self.y += Math.sin(LK.ticks * 0.1) * 0.5;
			}
			// Apply gravity
			self.velocity += self.gravity;
			self.y += self.velocity;
			// Simulate air resistance with slight horizontal movement
			self.x += Math.sin(self.y * 0.05) * 0.5;
			// Rotate bird based on velocity
			if (self.velocity > 0) {
				var targetRotation = Math.min(Math.PI / 2, self.velocity * 0.05);
				tween(self, {
					rotation: targetRotation
				}, {
					duration: 100,
					easing: tween.linear
				});
			}
		}
	};
	self.die = function () {
		self.dead = true;
		LK.getSound('hit').play();
		LK.effects.flashObject(self, 0xFF0000, 500);
	};
	return self;
});
var Ground = Container.expand(function () {
	var self = Container.call(this);
	self.groundGraphics = self.attachAsset('ground', {
		anchorX: 0,
		anchorY: 0
	});
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	var topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	var bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0.0,
		y: 250 // Gap size between pipes
	});
	self.speed = 5;
	self.width = topPipe.width;
	self.scored = false;
	self.setGapPosition = function (y) {
		topPipe.y = y;
		bottomPipe.y = y + 250; // Gap size
	};
	self.update = function () {
		self.x -= self.speed;
	};
	// Collision detection helper
	self.checkCollision = function (bird) {
		if (bird.dead) {
			return false;
		}
		var birdBox = {
			x: bird.x - bird.width / 3,
			y: bird.y - bird.height / 3,
			width: bird.width / 1.5,
			height: bird.height / 1.5
		};
		var topPipeBox = {
			x: self.x - topPipe.width / 2,
			y: self.y + topPipe.y - topPipe.height,
			width: topPipe.width,
			height: topPipe.height
		};
		var bottomPipeBox = {
			x: self.x - bottomPipe.width / 2,
			y: self.y + bottomPipe.y,
			width: bottomPipe.width,
			height: bottomPipe.height
		};
		// Check collision with top pipe
		if (birdBox.x + birdBox.width > topPipeBox.x && birdBox.x < topPipeBox.x + topPipeBox.width && birdBox.y + birdBox.height > topPipeBox.y && birdBox.y < topPipeBox.y + topPipeBox.height) {
			return true;
		}
		// Check collision with bottom pipe
		if (birdBox.x + birdBox.width > bottomPipeBox.x && birdBox.x < bottomPipeBox.x + bottomPipeBox.width && birdBox.y + birdBox.height > bottomPipeBox.y && birdBox.y < bottomPipeBox.y + bottomPipeBox.height) {
			return true;
		}
		return false;
	};
	self.checkScore = function (bird) {
		if (bird.dead || self.scored) {
			return false;
		}
		if (self.x + self.width / 2 < bird.x) {
			self.scored = true;
			return true;
		}
		return false;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB // Sky blue background
});

/**** 
* Game Code
****/ 
var gameWidth = 2048;
var gameHeight = 2732;
var gameStarted = false;
var gameOver = false;
var bird;
var pipes = [];
var grounds = [];
var score = 0;
var highScore = storage.highScore || 0;
var pipeSpawnTimer;
var groundSpawnTimer;
// Text elements
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
var instructionsTxt = new Text2('TAP TO START', {
	size: 100,
	fill: 0xFFFFFF
});
instructionsTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(instructionsTxt);
var highScoreTxt = new Text2('BEST: 0', {
	size: 70,
	fill: 0xFFFFFF
});
highScoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(highScoreTxt);
highScoreTxt.y = 250;
highScoreTxt.setText('BEST: ' + highScore);
// Initialize bird
function createBird() {
	bird = new Bird();
	bird.x = gameWidth * 0.3;
	bird.y = gameHeight * 0.5;
	game.addChild(bird);
}
// Create initial ground segments
function createInitialGrounds() {
	for (var i = 0; i < 3; i++) {
		var ground = new Ground();
		ground.x = i * ground.width;
		ground.y = gameHeight - ground.groundGraphics.height;
		ground.height = ground.groundGraphics.height;
		ground.width = ground.groundGraphics.width;
		grounds.push(ground);
		game.addChild(ground);
	}
}
// Create a new pipe
function spawnPipe() {
	var pipe = new Pipe();
	pipe.x = gameWidth + pipe.width / 2;
	// Random gap position, but not too high or low
	var minY = gameHeight * 0.2;
	var maxY = gameHeight * 0.6;
	var gapY = minY + Math.random() * (maxY - minY);
	pipe.setGapPosition(-gapY);
	pipes.push(pipe);
	game.addChild(pipe);
}
// Create a new ground segment
function spawnGround() {
	var lastGround = grounds[grounds.length - 1];
	var ground = new Ground();
	ground.x = lastGround.x + lastGround.width;
	ground.y = gameHeight - ground.groundGraphics.height;
	ground.height = ground.groundGraphics.height;
	ground.width = ground.groundGraphics.width;
	grounds.push(ground);
	game.addChild(ground);
}
// Update score
function updateScore() {
	score++;
	scoreTxt.setText(score.toString());
	LK.getSound('score').play();
	if (score > highScore) {
		highScore = score;
		storage.highScore = highScore;
		highScoreTxt.setText('BEST: ' + highScore);
	}
	LK.setScore(score);
}
// Game over logic
function triggerGameOver() {
	gameOver = true;
	LK.clearInterval(pipeSpawnTimer);
	LK.clearInterval(groundSpawnTimer);
	bird.die();
	// Show game over after a short delay
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 1000);
}
// Start the game
function startGame() {
	if (!gameStarted) {
		gameStarted = true;
		instructionsTxt.visible = false;
		// Spawn pipes at regular intervals
		pipeSpawnTimer = LK.setInterval(function () {
			spawnPipe();
		}, 1500);
		// Spawn ground segments as needed
		groundSpawnTimer = LK.setInterval(function () {
			if (grounds.length < 5) {
				spawnGround();
			}
		}, 1000);
		// Start background music
		LK.playMusic('bgmusic', {
			fade: {
				start: 0,
				end: 0.3,
				duration: 1000
			}
		});
	}
	// Make the bird flap
	if (bird && !gameOver) {
		bird.flap();
	}
}
// Initialize game elements
createBird();
createInitialGrounds();
// Input handling
game.down = function (x, y, obj) {
	startGame();
};
// Game update loop
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Update bird
	if (bird) {
		bird.update();
		// Check for collision with ground
		if (bird.y > gameHeight - grounds[0].height - bird.height / 2) {
			bird.y = gameHeight - grounds[0].height - bird.height / 2;
			if (!gameOver) {
				triggerGameOver();
			}
		}
		// Check for top boundary
		if (bird.y < bird.height / 2) {
			bird.y = bird.height / 2;
			bird.velocity = 0;
		}
	}
	// Update pipes
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		pipe.update();
		// Check if pipe is off screen
		if (pipe.x < -pipe.width) {
			pipe.destroy();
			pipes.splice(i, 1);
			continue;
		}
		// Check for collision with bird
		if (pipe.checkCollision(bird) && !gameOver) {
			triggerGameOver();
		}
		// Check if bird passed the pipe to score
		if (pipe.checkScore(bird)) {
			updateScore();
		}
	}
	// Update ground segments
	for (var j = grounds.length - 1; j >= 0; j--) {
		var ground = grounds[j];
		ground.x -= 5; // Same speed as pipes
		// Check if ground is off screen
		if (ground.x + ground.width < 0) {
			ground.destroy();
			grounds.splice(j, 1);
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -201,8 +201,9 @@
 	for (var i = 0; i < 3; i++) {
 		var ground = new Ground();
 		ground.x = i * ground.width;
 		ground.y = gameHeight - ground.groundGraphics.height;
+		ground.height = ground.groundGraphics.height;
 		ground.width = ground.groundGraphics.width;
 		grounds.push(ground);
 		game.addChild(ground);
 	}
@@ -224,8 +225,9 @@
 	var lastGround = grounds[grounds.length - 1];
 	var ground = new Ground();
 	ground.x = lastGround.x + lastGround.width;
 	ground.y = gameHeight - ground.groundGraphics.height;
+	ground.height = ground.groundGraphics.height;
 	ground.width = ground.groundGraphics.width;
 	grounds.push(ground);
 	game.addChild(ground);
 }