===================================================================
--- original.js
+++ change.js
@@ -1,86 +1,108 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Bomb class
 var Bomb = Container.expand(function () {
-  var self = Container.call(this);
-  var bombGraphics = self.attachAsset('bomb', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.explode = function () {
-    // Create explosion effect
-    LK.effects.flashObject(self, 0xff0000, 500);
-    // Damage nearby buildings
-    for (var i = 0; i < buildings.length; i++) {
-      if (self.intersects(buildings[i])) {
-        buildings[i].takeDamage(50);
-      }
-    }
-    self.destroy();
-  };
+	var self = Container.call(this);
+	var bombGraphics = self.attachAsset('bomb', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.explode = function () {
+		// Create explosion effect
+		var explosion = new Explosion();
+		explosion.x = self.x;
+		explosion.y = self.y;
+		game.addChild(explosion);
+		explosion.init();
+		// Damage nearby buildings
+		for (var i = 0; i < buildings.length; i++) {
+			if (self.intersects(buildings[i])) {
+				buildings[i].takeDamage(50);
+			}
+		}
+		self.destroy();
+	};
 });
 //<Assets used in the game will automatically appear here>
 // Building class
 var Building = Container.expand(function () {
-  var self = Container.call(this);
-  var buildingGraphics = self.attachAsset('building', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.health = 100;
-  self.update = function () {
-    if (self.health <= 0) {
-      self.destroy();
-    }
-  };
-  self.takeDamage = function (damage) {
-    self.health -= damage;
-  };
+	var self = Container.call(this);
+	var buildingGraphics = self.attachAsset('building', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 100;
+	self.update = function () {
+		if (self.health <= 0) {
+			self.destroy();
+		}
+	};
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+	};
 });
+// Explosion class
+var Explosion = Container.expand(function () {
+	var self = Container.call(this);
+	self.init = function () {
+		// Create explosion effect
+		LK.effects.flashObject(self, 0xff0000, 500);
+	};
+});
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Initialize buildings array
 var buildings = [];
 // Create buildings
 for (var i = 0; i < 5; i++) {
-  var building = new Building();
-  building.x = 400 * (i + 1);
-  building.y = 1366;
-  buildings.push(building);
-  game.addChild(building);
+	var building = new Building();
+	building.x = 400 * (i + 1);
+	building.y = 1366;
+	buildings.push(building);
+	game.addChild(building);
 }
 // Initialize bombs array
 var bombs = [];
 // Handle touch down event to place bombs
 game.down = function (x, y, obj) {
-  var bomb = new Bomb();
-  bomb.x = x;
-  bomb.y = y;
-  bombs.push(bomb);
-  game.addChild(bomb);
-  bomb.explode();
+	var bomb = new Bomb();
+	bomb.x = x;
+	bomb.y = y;
+	bombs.push(bomb);
+	game.addChild(bomb);
+	bomb.explode();
 };
 // Update game state
 game.update = function () {
-  for (var i = buildings.length - 1; i >= 0; i--) {
-    buildings[i].update();
-    if (buildings[i].health <= 0) {
-      buildings.splice(i, 1);
-    }
-  }
-  for (var j = bombs.length - 1; j >= 0; j--) {
-    if (bombs[j].destroyed) {
-      bombs.splice(j, 1);
-    }
-  }
+	for (var i = buildings.length - 1; i >= 0; i--) {
+		buildings[i].update();
+		if (buildings[i].health <= 0) {
+			buildings.splice(i, 1);
+		}
+	}
+	for (var j = bombs.length - 1; j >= 0; j--) {
+		if (bombs[j].destroyed) {
+			bombs.splice(j, 1);
+		}
+	}
+	// Add new buildings when all are destroyed
+	if (buildings.length === 0) {
+		for (var i = 0; i < 5; i++) {
+			var building = new Building();
+			building.x = 400 * (i + 1);
+			building.y = 1366;
+			buildings.push(building);
+			game.addChild(building);
+		}
+	}
 };
\ No newline at end of file