/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// Car class
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.maxSpeed = 10;
	self.acceleration = 0.2;
	self.deceleration = 0.1;
	self.update = function () {
		self.y -= self.speed;
		if (self.speed > 0) {
			self.speed -= self.deceleration;
		}
	};
	self.accelerate = function () {
		if (self.speed < self.maxSpeed) {
			self.speed += self.acceleration;
		}
	};
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5 / 1.5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
			var index = obstacles.indexOf(self);
			if (index > -1) {
				obstacles.splice(index, 1);
			}
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background 
});

/**** 
* Game Code
****/ 
var racetrack = LK.getAsset('racetrack', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2
});
game.addChild(racetrack);
var car = game.addChild(new Car());
car.x = 2048 / 2;
car.y = 2732 - 200 - 77;
var obstacles = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnObstacle() {
	if (obstacles.length < 5) {
		var obstacle = new Obstacle();
		var randomColor = Math.floor(Math.random() * 0xFFFFFF);
		obstacle.children[0].tint = randomColor;
		var validPosition = false;
		while (!validPosition) {
			obstacle.x = 200 + Math.random() * (2048 - 400);
			validPosition = true;
			for (var i = 0; i < obstacles.length; i++) {
				if (Math.abs(obstacle.x - obstacles[i].x) < 100) {
					validPosition = false;
					break;
				}
			}
		}
		var validYPosition = false;
		while (!validYPosition) {
			obstacle.y = -100;
			validYPosition = true;
			for (var i = 0; i < obstacles.length; i++) {
				if (Math.abs(obstacle.y - obstacles[i].y) < 100) {
					validYPosition = false;
					break;
				}
			}
		}
		obstacles.push(obstacle);
		game.addChild(obstacle);
	}
}
function updateScore() {
	score += 1;
	scoreTxt.setText(score);
}
game.move = function (x, y, obj) {
	car.x = x;
};
game.update = function () {
	car.update();
	// Ensure car does not move out of bounds
	if (car.x < 0) {
		car.x = 0;
	} else if (car.x > 2048) {
		car.x = 2048;
	}
	for (var i = obstacles.length - 1; i >= 0; i--) {
		obstacles[i].update();
		if (car.intersects(obstacles[i])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
	if (LK.ticks % 60 == 0) {
		spawnObstacle();
		updateScore();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -79,12 +79,12 @@
 		var randomColor = Math.floor(Math.random() * 0xFFFFFF);
 		obstacle.children[0].tint = randomColor;
 		var validPosition = false;
 		while (!validPosition) {
-			obstacle.x = Math.random() * 2048;
+			obstacle.x = 200 + Math.random() * (2048 - 400);
 			validPosition = true;
 			for (var i = 0; i < obstacles.length; i++) {
-				if (Math.abs(obstacle.x - obstacles[i].x) < 100 && Math.abs(obstacle.y - obstacles[i].y) < 100) {
+				if (Math.abs(obstacle.x - obstacles[i].x) < 100) {
 					validPosition = false;
 					break;
 				}
 			}
@@ -93,9 +93,9 @@
 		while (!validYPosition) {
 			obstacle.y = -100;
 			validYPosition = true;
 			for (var i = 0; i < obstacles.length; i++) {
-				if (Math.abs(obstacle.x - obstacles[i].x) < 100 && Math.abs(obstacle.y - obstacles[i].y) < 100) {
+				if (Math.abs(obstacle.y - obstacles[i].y) < 100) {
 					validYPosition = false;
 					break;
 				}
 			}