/**** 
* Classes
****/ 
// Assets will be automatically created and loaded during gameplay
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.gravity = 0.5;
	self.lift = -10;
	self.velocity = 0;
	self.update = function () {
		self.velocity += self.gravity;
		self.y += self.velocity;
		if (self.y > 2732 - birdGraphics.height / 2 || self.y < birdGraphics.height / 2) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	};
	self.flap = function () {
		self.velocity = self.lift;
	};
});
// Coin class
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -coinGraphics.width / 2) {
			self.destroy();
		}
	};
});
// Downside Obstacle class
var DownsideObstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -obstacleGraphics.width / 2) {
			self.destroy();
		}
	};
});
// 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;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -obstacleGraphics.width / 2) {
			self.destroy();
		}
	};
});
// Rod class
var Rod = Container.expand(function () {
	var self = Container.call(this);
	var rodGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -rodGraphics.width / 2) {
			self.destroy();
		}
	};
});
// Upside Obstacle class
var UpsideObstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -obstacleGraphics.width / 2) {
			self.destroy();
		}
	};
});

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

/**** 
* Game Code
****/ 
var bird = game.addChild(new Bird());
bird.x = 2048 / 4;
bird.y = 2732 / 2;
var obstacles = [];
var coins = [];
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() {
	var obstacle = new Obstacle();
	obstacle.x = 2048 + obstacle.width / 2;
	obstacle.y = Math.random() * (2732 - obstacle.height) + obstacle.height / 2;
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
function spawnCoin() {
	var coin = new Coin();
	coin.x = 2048 + coin.width / 2;
	coin.y = Math.random() * (2732 - coin.height) + coin.height / 2;
	coins.push(coin);
	game.addChild(coin);
}
game.down = function (x, y, obj) {
	bird.flap();
};
game.update = function () {
	if (LK.ticks % 150 == 0) {
		var rod = new Rod();
		rod.x = 2048 + rod.width / 2;
		rod.y = 2732;
		game.addChild(rod);
	}
	bird.update();
	if (bird.y > 2732 - bird.height / 2 || bird.y < bird.height / 2) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	}
	for (var i = obstacles.length - 1; i >= 0; i--) {
		obstacles[i].update();
		if (bird.intersects(obstacles[i])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
	for (var j = coins.length - 1; j >= 0; j--) {
		coins[j].update();
		if (bird.intersects(coins[j])) {
			score += 1;
			scoreTxt.setText(score);
			coins[j].destroy();
			coins.splice(j, 1);
		}
	}
	if (LK.ticks % 120 == 0) {
		spawnObstacle();
		var upsideObstacle = new UpsideObstacle();
		upsideObstacle.x = 2048 + upsideObstacle.width / 2;
		upsideObstacle.y = Math.random() * (2732 / 2 - upsideObstacle.height / 2);
		obstacles.push(upsideObstacle);
		game.addChild(upsideObstacle);
		var downsideObstacle = new DownsideObstacle();
		downsideObstacle.x = 2048 + downsideObstacle.width / 2;
		downsideObstacle.y = Math.random() * (2732 / 2 - downsideObstacle.height / 2) + 2732 / 2;
		obstacles.push(downsideObstacle);
		game.addChild(downsideObstacle);
	}
	if (LK.ticks % 180 == 0) {
		spawnCoin();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -38,8 +38,23 @@
 			self.destroy();
 		}
 	};
 });
+// Downside Obstacle class
+var DownsideObstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -5;
+	self.update = function () {
+		self.x += self.speed;
+		if (self.x < -obstacleGraphics.width / 2) {
+			self.destroy();
+		}
+	};
+});
 // Obstacle class
 var Obstacle = Container.expand(function () {
 	var self = Container.call(this);
 	var obstacleGraphics = self.attachAsset('obstacle', {
@@ -68,8 +83,23 @@
 			self.destroy();
 		}
 	};
 });
+// Upside Obstacle class
+var UpsideObstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -5;
+	self.update = function () {
+		self.x += self.speed;
+		if (self.x < -obstacleGraphics.width / 2) {
+			self.destroy();
+		}
+	};
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -138,8 +168,18 @@
 		}
 	}
 	if (LK.ticks % 120 == 0) {
 		spawnObstacle();
+		var upsideObstacle = new UpsideObstacle();
+		upsideObstacle.x = 2048 + upsideObstacle.width / 2;
+		upsideObstacle.y = Math.random() * (2732 / 2 - upsideObstacle.height / 2);
+		obstacles.push(upsideObstacle);
+		game.addChild(upsideObstacle);
+		var downsideObstacle = new DownsideObstacle();
+		downsideObstacle.x = 2048 + downsideObstacle.width / 2;
+		downsideObstacle.y = Math.random() * (2732 / 2 - downsideObstacle.height / 2) + 2732 / 2;
+		obstacles.push(downsideObstacle);
+		game.addChild(downsideObstacle);
 	}
 	if (LK.ticks % 180 == 0) {
 		spawnCoin();
 	}