/**** 
* Classes
****/ 
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 1.0,
		width: 200,
		height: 200
	});
	self.speed = 10;
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -100) {
			self.destroy();
		}
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Dinosaur class
var Dinosaur = Container.expand(function () {
	var self = Container.call(this);
	var dinoGraphics = self.attachAsset('dino', {
		anchorX: 0.5,
		anchorY: 1.0,
		width: 200,
		height: 200
	});
	self.isJumping = false;
	self.jumpSpeed = 0;
	self.gravity = 0.5;
	self.groundY = ground.y - ground.height; // Ground level
	self.update = function () {
		if (self.isJumping) {
			self.y += self.jumpSpeed;
			self.jumpSpeed += self.gravity;
			if (self.y >= self.groundY) {
				self.y = self.groundY;
				self.isJumping = false;
			}
		}
	};
	self.jump = function () {
		if (!self.isJumping) {
			self.isJumping = true;
			self.jumpSpeed = -20;
		}
	};
});
// Ground class
var Ground = Container.expand(function () {
	var self = Container.call(this);
	var groundGraphics = self.attachAsset('road', {
		anchorX: 0.5,
		anchorY: 1.0,
		width: 4096
	});
	self.speed = 10;
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -self.width / 2) {
			self.x = 0;
			var newGround = new Ground();
			newGround.x = self.width;
			newGround.y = self.y;
			game.addChild(newGround);
		}
	};
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('cactus', {
		anchorX: 0.5,
		anchorY: 1.0,
		width: 200,
		height: 200
	});
	self.speed = 10;
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -100) {
			self.destroy();
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xFFFFFF // Init game with white background
});

/**** 
* Game Code
****/ 
// Initialize game variables
var desertBackground = game.addChild(LK.getAsset('desert', {
	anchorX: 0,
	anchorY: 0
}));
var ground = game.addChild(new Ground());
ground.x = 0;
ground.y = 2732;
var dinosaur = game.addChild(new Dinosaur());
dinosaur.x = 200;
dinosaur.y = ground.y - ground.height;
var obstacles = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 100,
	fill: 0x000000
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Function to spawn obstacles
function spawnObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 2048;
	obstacle.y = ground.y - ground.height;
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
function spawnBird() {
	var bird = new Bird();
	bird.x = 2048;
	bird.y = Math.random() * (dinosaur.y - dinosaur.height - 200);
	obstacles.push(bird);
	game.addChild(bird);
}
// Handle game updates
game.update = function () {
	dinosaur.update();
	for (var i = obstacles.length - 1; i >= 0; i--) {
		obstacles[i].update();
		if (dinosaur.intersects(obstacles[i])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		if (obstacles[i].x < -100) {
			obstacles[i].destroy();
			obstacles.splice(i, 1);
		}
	}
	if (LK.ticks % 60 == 0) {
		score++;
		scoreTxt.setText(score);
	}
	if (LK.ticks % 120 == 0) {
		spawnObstacle();
	}
	if (LK.ticks % 180 == 0) {
		spawnBird();
	}
};
// Handle user input for jumping
game.down = function (x, y, obj) {
	dinosaur.jump();
};

===================================================================
--- original.js
+++ change.js
@@ -127,9 +127,9 @@
 }
 function spawnBird() {
 	var bird = new Bird();
 	bird.x = 2048;
-	bird.y = Math.random() * (ground.y - ground.height - 200);
+	bird.y = Math.random() * (dinosaur.y - dinosaur.height - 200);
 	obstacles.push(bird);
 	game.addChild(bird);
 }
 // Handle game updates