===================================================================
--- original.js
+++ change.js
@@ -1,94 +1,94 @@
-/****
+/**** 
 * Classes
-****/
-// Obstacle class
-var Obstacle = Container.expand(function () {
-  var self = Container.call(this);
-  var obstacleGraphics = self.attachAsset('obstacle', {
-    anchorX: 0.5,
-    anchorY: 1.0 // Anchor at the bottom for easier ground alignment
-  });
-  self.speedX = -5;
-  self.move = function () {
-    self.x += self.speedX;
-  };
-  self.isOffScreen = function () {
-    return self.x < -obstacleGraphics.width;
-  };
+****/ 
+// Hurdle class
+var Hurdle = Container.expand(function () {
+	var self = Container.call(this);
+	var hurdleGraphics = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.0 // Anchor at the top for easier sky alignment
+	});
+	self.speedY = 5;
+	self.move = function () {
+		self.y += self.speedY;
+	};
+	self.isOffScreen = function () {
+		return self.y > game.height;
+	};
 });
 // Assets are automatically created based on usage in the code.
 // Player class
 var Player = Container.expand(function () {
-  var self = Container.call(this);
-  var playerGraphics = self.attachAsset('player', {
-    anchorX: 0.5,
-    anchorY: 1.0 // Anchor at the bottom center for easier ground alignment
-  });
-  self.speedY = 0;
-  self.gravity = 0.5;
-  self.jumpPower = -15;
-  self.grounded = false;
-  self.update = function () {
-    // Apply gravity
-    if (!self.grounded) {
-      self.speedY += self.gravity;
-      self.y += self.speedY;
-    }
-    // Check for ground
-    if (self.y >= game.height - playerGraphics.height) {
-      self.y = game.height - playerGraphics.height;
-      self.grounded = true;
-      self.speedY = 0;
-    }
-  };
-  self.jump = function () {
-    if (self.grounded) {
-      self.speedY = self.jumpPower;
-      self.grounded = false;
-    }
-  };
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 1.0 // Anchor at the bottom center for easier ground alignment
+	});
+	self.speedY = 0;
+	self.gravity = 0.5;
+	self.jumpPower = -15;
+	self.grounded = false;
+	self.update = function () {
+		// Apply gravity
+		if (!self.grounded) {
+			self.speedY += self.gravity;
+			self.y += self.speedY;
+		}
+		// Check for ground
+		if (self.y >= game.height - playerGraphics.height) {
+			self.y = game.height - playerGraphics.height;
+			self.grounded = true;
+			self.speedY = 0;
+		}
+	};
+	self.jump = function () {
+		if (self.grounded) {
+			self.speedY = self.jumpPower;
+			self.grounded = false;
+		}
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x87CEEB // Light blue background to simulate the sky
+	backgroundColor: 0x87CEEB // Light blue background to simulate the sky
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 var player = game.addChild(new Player());
 player.x = 200;
 player.y = game.height - 100; // Start position near the bottom of the screen
 var obstacles = [];
 var spawnObstacleTimer = 0;
 var spawnObstacleInterval = 120; // Frames until next obstacle spawns
 game.on('down', function (obj) {
-  player.jump();
+	player.jump();
 });
 LK.on('tick', function () {
-  player.update();
-  // Handle obstacle movement and cleanup
-  for (var i = obstacles.length - 1; i >= 0; i--) {
-    obstacles[i].move();
-    if (obstacles[i].isOffScreen()) {
-      obstacles[i].destroy();
-      obstacles.splice(i, 1);
-    } else if (player.intersects(obstacles[i])) {
-      // Game over logic
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-  }
-  // Spawn obstacles
-  spawnObstacleTimer++;
-  if (spawnObstacleTimer >= spawnObstacleInterval) {
-    var obstacle = game.addChild(new Obstacle());
-    obstacle.x = game.width;
-    obstacle.y = game.height - 100; // Position at ground level
-    obstacles.push(obstacle);
-    spawnObstacleTimer = 0;
-  }
+	player.update();
+	// Handle obstacle movement and cleanup
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		obstacles[i].move();
+		if (obstacles[i].isOffScreen()) {
+			obstacles[i].destroy();
+			obstacles.splice(i, 1);
+		} else if (player.intersects(obstacles[i])) {
+			// Game over logic
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+	}
+	// Spawn hurdles
+	spawnObstacleTimer++;
+	if (spawnObstacleTimer >= spawnObstacleInterval) {
+		var hurdle = game.addChild(new Hurdle());
+		hurdle.x = Math.random() * game.width; // Random position along the width of the screen
+		hurdle.y = 0; // Position at the top of the screen
+		obstacles.push(hurdle);
+		spawnObstacleTimer = 0;
+	}
 });
\ No newline at end of file