===================================================================
--- original.js
+++ change.js
@@ -1,108 +1,146 @@
-/****
+/**** 
 * Classes
 ****/
+var Ghost = Container.expand(function () {
+	var self = Container.call(this);
+	var ghostGraphics = self.attachAsset('ghost', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		alpha: 0.5
+	});
+	self.speedX = Math.random() * 4 - 2;
+	self.speedY = Math.random() * 4 - 2;
+	self.move = function () {
+		self.x += self.speedX;
+		self.y += self.speedY;
+		// Reverse direction if hitting the edges of the screen
+		if (self.x < 50 || self.x > 1998) {
+			self.speedX *= -1;
+		}
+		if (self.y < 50 || self.y > 2682) {
+			self.speedY *= -1;
+		}
+	};
+});
 // Block class
 var Block = Container.expand(function () {
-  var self = Container.call(this);
-  var blockGraphics = self.attachAsset('block', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.move = function () {
-    self.y += self.speed;
-  };
+	var self = Container.call(this);
+	var blockGraphics = self.attachAsset('block', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.move = function () {
+		self.y += self.speed;
+	};
 });
 // Character class
 var Character = Container.expand(function () {
-  var self = Container.call(this);
-  var characterGraphics = self.attachAsset('character', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.moveLeft = function () {
-    if (self.x > 50) {
-      self.x -= 10;
-    }
-  };
-  self.moveRight = function () {
-    if (self.x < 1998) {
-      self.x += 10;
-    }
-  };
+	var self = Container.call(this);
+	var characterGraphics = self.attachAsset('character', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.moveLeft = function () {
+		if (self.x > 50) {
+			self.x -= 10;
+		}
+	};
+	self.moveRight = function () {
+		if (self.x < 1998) {
+			self.x += 10;
+		}
+	};
 });
 
-/****
+/**** 
 * Initialize Game
 ****/
 var game = new LK.Game({
-  backgroundColor: 0x000000 // Init game with black background
+	backgroundColor: 0x1b1b1b // Init game with a dark grey background
 });
 
-/****
+/**** 
 * Game Code
 ****/
-// Initialize character
 // Initialize assets used in this game.
+// Initialize character
 var character = game.addChild(new Character());
 character.x = 1024;
 character.y = 2632;
 // Initialize blocks array
 var blocks = [];
 // Initialize score
 var score = 0;
 var scoreTxt = new Text2(score.toString(), {
-  size: 150,
-  fill: "#ffffff"
+	size: 150,
+	fill: "#ffffff"
 });
 scoreTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(scoreTxt);
 // Handle touch events
 var touchPosition = null;
 game.on('down', function (obj) {
-  touchPosition = obj.event.getLocalPosition(game);
+	touchPosition = obj.event.getLocalPosition(game);
 });
 game.on('up', function (obj) {
-  touchPosition = null;
+	touchPosition = null;
 });
 game.on('move', function (obj) {
-  if (touchPosition) {
-    touchPosition = obj.event.getLocalPosition(game);
-  }
+	if (touchPosition) {
+		touchPosition = obj.event.getLocalPosition(game);
+	}
 });
 // Game tick event
 LK.on('tick', function () {
-  // Move character based on touch position
-  if (touchPosition) {
-    if (touchPosition.x < character.x) {
-      character.moveLeft();
-    } else if (touchPosition.x > character.x) {
-      character.moveRight();
-    }
-  }
-  // Move blocks
-  for (var i = blocks.length - 1; i >= 0; i--) {
-    blocks[i].move();
-    // Check for collision with character
-    if (blocks[i].intersects(character)) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-    // Remove off-screen blocks
-    if (blocks[i].y > 2782) {
-      blocks[i].destroy();
-      blocks.splice(i, 1);
-    }
-  }
-  // Add new blocks
-  if (LK.ticks % 60 == 0) {
-    var newBlock = new Block();
-    newBlock.x = Math.random() * 2048;
-    newBlock.y = -50;
-    blocks.push(newBlock);
-    game.addChild(newBlock);
-  }
-  // Update score
-  score++;
-  scoreTxt.setText(score.toString());
+	// Move character based on touch position
+	if (touchPosition) {
+		if (touchPosition.x < character.x) {
+			character.moveLeft();
+		} else if (touchPosition.x > character.x) {
+			character.moveRight();
+		}
+	}
+	// Move blocks
+	for (var i = blocks.length - 1; i >= 0; i--) {
+		blocks[i].move();
+		// Check for collision with character
+		if (blocks[i].intersects(character)) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+		// Remove off-screen blocks
+		if (blocks[i].y > 2782) {
+			blocks[i].destroy();
+			blocks.splice(i, 1);
+		}
+	}
+	// Move ghosts
+	for (var j = ghosts.length - 1; j >= 0; j--) {
+		ghosts[j].move();
+		// Game over if character touches a ghost
+		if (ghosts[j].intersects(character)) {
+			LK.effects.flashScreen(0x000000, 2000);
+			LK.showGameOver();
+		}
+	}
+	// Add new blocks
+	if (LK.ticks % 60 == 0) {
+		var newBlock = new Block();
+		newBlock.x = Math.random() * 2048;
+		newBlock.y = -50;
+		blocks.push(newBlock);
+		game.addChild(newBlock);
+	}
+	// Add new ghosts
+	if (LK.ticks % 180 == 0) {
+		var newGhost = new Ghost();
+		newGhost.x = Math.random() * 2048;
+		newGhost.y = Math.random() * 2732;
+		ghosts.push(newGhost);
+		game.addChild(newGhost);
+	}
+	// Update score
+	score++;
+	scoreTxt.setText(score.toString());
 });
\ No newline at end of file