===================================================================
--- original.js
+++ change.js
@@ -51,10 +51,15 @@
         self.flyInY = Math.random() * (2732 / 2 - 100) + 50;
         self.angle = 0;
         self.shootCounter = Math.random() * 100;
 
-        self.shoot = function() {
-            var enemyBullet = new EnemyBullet();
+        self.shoot = function(heroX, heroY) {
+            var dx = heroX - self.x;
+            var dy = heroY - self.y;
+            var distance = Math.sqrt(dx * dx + dy * dy);
+            var vx = 7 * dx / distance;
+            var vy = 7 * dy / distance;
+            var enemyBullet = new EnemyBullet(vx, vy);
             enemyBullet.x = self.x;
             enemyBullet.y = self.y + enemyGraphics.height / 2;
             return enemyBullet;
         };
@@ -72,12 +77,18 @@
             }
         };
     });
 
-    var EnemyBullet = Container.expand(function() {
+    var EnemyBullet = Container.expand(function(vx, vy) {
         var self = Container.call(this);
         var bulletGraphics = XS.getAsset('enemyBullet', 'Enemy Bullet');
         self.addChild(bulletGraphics);
+        self.vx = vx;
+        self.vy = vy;
+        self.move = function() {
+            self.x += self.vx;
+            self.y += self.vy;
+        };
     });
 
     var Bullet = Container.expand(function() {
         var self = Container.call(this);
@@ -170,17 +181,17 @@
                 enemies[i].move(5); // Use new move function
                 enemies[i].shootCounter--;
 
                 if (enemies[i].shootCounter <= 0) {
-                    var enemyBullet = enemies[i].shoot();
+                    var enemyBullet = enemies[i].shoot(hero.x, hero.y);
                     self.addChild(enemyBullet);
                     enemyBullets.push(enemyBullet);
                     enemies[i].shootCounter = 100 + Math.random() * 100;
                 }
             }
 
             for (var j = 0; j < enemyBullets.length; j++) {
-                enemyBullets[j].y += 7;
+                enemyBullets[j].move();
 
                 if (enemyBullets[j].y > stage.height + 30) {
                     self.removeChild(enemyBullets[j]);
                     enemyBullets.splice(j, 1);