/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Bird class representing the player-controlled character
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;
	// Update method for bird movement
	self.update = function () {
		self.velocity += self.gravity;
		self.y += self.velocity;
	};
	// Flap method to make the bird jump
	self.flap = function () {
		self.velocity = self.flapStrength;
	};
});
// Obstacle class representing the pipes
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var topWall = self.attachAsset('wall', {
		anchorX: 0.5,
		anchorY: 1
	});
	var bottomWall = self.attachAsset('wall', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.speed = -5;
	self.gap = 400;
	// Randomize the gap position
	self.randomizePosition = function () {
		var gapPosition = Math.random() * (2048 - self.gap - 200) + 100;
		topPipe.y = gapPosition - self.gap / 2;
		bottomPipe.y = gapPosition + self.gap / 2;
	};
	// Update method for obstacle movement
	self.update = function () {
		self.x += self.speed;
	};
});

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

/**** 
* Game Code
****/ 
// Initialize game variables
var background = game.addChild(LK.getAsset('Background', {
	anchorX: 0,
	anchorY: 0
}));
background.width = 2048;
background.height = 2732;
var bird = game.addChild(new Bird());
bird.x = 300;
bird.y = 1366; // Center vertically
var obstacles = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Function to create a new obstacle
function createObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 2048;
	obstacle.randomizePosition();
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Handle game touch events
game.down = function (x, y, obj) {
	bird.flap();
};
// Update game logic
game.update = function () {
	bird.update();
	// Check for collisions and update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		obstacles[i].update();
		// Check for collision with bird
		if (bird.intersects(obstacles[i])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		// Remove off-screen obstacles and update score
		if (obstacles[i].x < -100) {
			obstacles[i].destroy();
			obstacles.splice(i, 1);
			score++;
			scoreTxt.setText(score);
		}
	}
	// Add new obstacles periodically
	if (LK.ticks % 90 == 0) {
		createObstacle();
	}
	// Check if bird hits the ground or flies too high
	if (bird.y > 2732 || bird.y < 0) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -38,10 +38,10 @@
 	self.gap = 400;
 	// Randomize the gap position
 	self.randomizePosition = function () {
 		var gapPosition = Math.random() * (2048 - self.gap - 200) + 100;
-		topWall.y = gapPosition - self.gap / 2;
-		bottomWall.y = gapPosition + self.gap / 2;
+		topPipe.y = gapPosition - self.gap / 2;
+		bottomPipe.y = gapPosition + self.gap / 2;
 	};
 	// Update method for obstacle movement
 	self.update = function () {
 		self.x += self.speed;