/**** 
* Classes
****/ 
// Assets will be automatically created based on usage in the code.
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedY = 10;
	self.flyUp = false;
	self._move_migrated = function () {
		// Bird falls down
		self.y += self.speedY;
		// If bird is flying up, decrease its y position
		if (self.flyUp) {
			self.speedY -= 80;
			if (self.speedY <= -10) {
				self.flyUp = false;
			}
		} else {
			self.speedY += 10;
			if (self.speedY > 10) {
				self.speedY = 11;
			}
		}
	};
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5,
		shape: 'ellipse'
	});
	self.speedX = -5;
	self._move_migrated = function () {
		// Obstacle moves from right to left
		self.x += self.speedX;
		// Rotate obstacle counterclockwise
		self.rotation -= 0.17;
	};
});

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

/**** 
* Game Code
****/ 
// Add background to the game
var background = game.addChild(LK.getAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2048 / 2
}));
var bird = game.addChild(new Bird());
bird.x = 350; // Start in the middle of the screen horizontally
bird.y = 1366; // Start in the middle of the screen vertically
// Add touch event listener to make bird move up and down smoothly
game.on('down', function (x, y, obj) {
	bird.flyUp = true;
	bird.rotation += Math.PI / 2; // Rotate 90 degrees
	bird.scale.y = 0.7; // Reduce bird size vertically by 10%
	LK.setTimeout(function () {
		bird.scale.y = 1; // Return bird to original size after 100ms
	}, 100);
	// Play 'Jump' sound when the screen is pressed
	LK.getSound('Jump').play();
});
var obstacles = [];
var obstacleCreationCounter = 0;
var score = 0; // Add a variable to track the player's score
LK.on('tick', function () {
	bird._move_migrated();
	// Create a new obstacle every 42 ticks (approximately 0.7 seconds)
	obstacleCreationCounter++;
	if (score < 15 && obstacleCreationCounter >= 36 || score >= 15 && score < 30 && obstacleCreationCounter >= 30 || score >= 30 && score < 45 && obstacleCreationCounter >= 24 || score >= 45 && score < 60 && obstacleCreationCounter >= 24 || score >= 60 && obstacleCreationCounter >= 18) {
		var newObstacle = game.addChild(new Obstacle());
		newObstacle.x = 2048; // Start at the right edge of the screen
		newObstacle.y = Math.random() * 2732; // Start at a random height
		// After 10 points, randomly change obstacle speed between -4 and -9
		if (score > 25) {
			newObstacle.speedX = Math.floor(Math.random() * (-10 + 4 + 1)) + -4;
		} else if (obstacles.length % 10 == 9) {
			newObstacle.speedX = -13;
		}
		obstacles.push(newObstacle);
		obstacleCreationCounter = 0;
	}
	// If the player's score is 13 or more, make the obstacles move up and down
	if (score >= 13) {
		for (var i = 0; i < obstacles.length; i++) {
			var obstacle = obstacles[i];
			obstacle.y += Math.sin(obstacle.x * 0.01) * 5; // Change the y position of the obstacle based on a sine wave
		}
	}
	// Move each obstacle and check for collisions
	for (var i = 0; i < obstacles.length; i++) {
		var obstacle = obstacles[i];
		obstacle._move_migrated();
		// Check if bird has collided with the obstacle
		var dx = bird.x - obstacle.x;
		var dy = bird.y - obstacle.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < bird.width / 2 + obstacle.width / 2) {
			// Play 'chainsaw' sound when the bird collides with an obstacle
			LK.getSound('chainsaw').play();
			// Flash screen red for 1 second (1000ms) to show game over.
			LK.effects.flashScreen(0xff0000, 1000);
			// Show game over. The game will be automatically paused while game over is showing.
			LK.showGameOver();
		}
	}
	// Check if bird has fallen off the screen or risen above the screen
	var dx = bird.x - 2048 / 2;
	var dy = bird.y - 2670 / 2;
	var distance = Math.sqrt(dx * dx + dy * dy);
	if (distance > 3000 / 2) {
		// Flash screen red for 1 second (1000ms) to show game over.
		LK.effects.flashScreen(0xff0000, 1000);
		// Show game over. The game will be automatically paused while game over is showing.
		LK.showGameOver();
	}
});
// Initialize bird and obstacles
// Yellow bird
// Brown obstacles;
var obstacle = game.addChild(new Obstacle());
obstacle.x = 2120; // Start at the right edge of the screen
obstacle.y = Math.random() * 2732; // Start at a random height;
// Initialize score counter
var score = 0;
var scoreTxt = new Text2(score.toString(), {
	size: 75,
	fill: "#FFFFFF"
});
scoreTxt.anchor.set(1, 0); // Anchor to the top right corner
LK.gui.topRight.addChild(scoreTxt);
// Update score every 2 seconds
LK.setInterval(function () {
	score++;
	scoreTxt.setText(score.toString());
	// Save the score
	LK.setScore(score);
}, 1300);
;

===================================================================
--- original.js
+++ change.js
@@ -111,8 +111,10 @@
 		var dx = bird.x - obstacle.x;
 		var dy = bird.y - obstacle.y;
 		var distance = Math.sqrt(dx * dx + dy * dy);
 		if (distance < bird.width / 2 + obstacle.width / 2) {
+			// Play 'chainsaw' sound when the bird collides with an obstacle
+			LK.getSound('chainsaw').play();
 			// Flash screen red for 1 second (1000ms) to show game over.
 			LK.effects.flashScreen(0xff0000, 1000);
 			// Show game over. The game will be automatically paused while game over is showing.
 			LK.showGameOver();