===================================================================
--- original.js
+++ change.js
@@ -3,28 +3,24 @@
 ****/ 
 // Boss class
 var Boss = Container.expand(function () {
 	var self = Container.call(this);
-	var bossGraphics = self.attachAsset('block', {
+	var bossGraphics = self.attachAsset('boss', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.speed = 3;
+	self.speed = 2;
 	self.hitpoints = 20; // Boss hitpoints
 	self.update = function () {
-		// Random movement in the top 30% of the screen
-		self.x += (Math.random() - 0.5) * self.speed;
-		self.y += (Math.random() - 0.5) * self.speed;
-		self.x = Math.max(Math.min(self.x, 2048), 0);
-		self.y = Math.max(Math.min(self.y, 2732 * 0.3), 0);
+		self.y += self.speed;
 		// Create and update hitpoints display
 		if (!self.hitpointsDisplay) {
 			self.hitpointsDisplay = new Text2(self.hitpoints.toString(), {
-				size: 50,
+				size: 100,
 				fill: "#ffffff"
 			});
 			self.hitpointsDisplay.anchor.set(0.5, 0);
-			self.hitpointsDisplay.y = 60;
+			self.hitpointsDisplay.y = 120;
 			self.addChild(self.hitpointsDisplay);
 		} else {
 			self.hitpointsDisplay.setText(self.hitpoints.toString());
 		}
@@ -56,8 +52,33 @@
 			self.destroy();
 		}
 	};
 });
+// Enemy class
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('block', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 3;
+	self.hitpoints = 3; // Add hitpoints to enemies
+	self.update = function () {
+		self.y += self.speed;
+		// Create and update hitpoints display
+		if (!self.hitpointsDisplay) {
+			self.hitpointsDisplay = new Text2(self.hitpoints.toString(), {
+				size: 50,
+				fill: "#ffffff"
+			});
+			self.hitpointsDisplay.anchor.set(0.5, 0);
+			self.hitpointsDisplay.y = 60;
+			self.addChild(self.hitpointsDisplay);
+		} else {
+			self.hitpointsDisplay.setText(self.hitpoints.toString());
+		}
+	};
+});
 //<Assets used in the game will automatically appear here>
 // Fairy class
 var Fairy = Container.expand(function () {
 	var self = Container.call(this);
@@ -287,8 +308,9 @@
 			}
 		} else if (waveCount == waveConfig.length + 1) {
 			// Spawn boss enemy
 			var boss = new Boss();
+			boss.hitpoints = 20; // Set boss hitpoints
 			boss.x = 2048 / 2;
 			boss.y = -50;
 			enemies.push(boss);
 			game.addChild(boss);