===================================================================
--- original.js
+++ change.js
@@ -89,10 +89,19 @@
 	}
 	// Update all hero bullets
 	for (var j = heroBullets.length - 1; j >= 0; j--) {
 		heroBullets[j].move();
-		// Check for bullet off-screen
-		if (heroBullets[j].y < 0) {
+		// Check for bullet off-screen or collision with enemies
+		for (var i = enemies.length - 1; i >= 0; i--) {
+			if (heroBullets[j].intersects(enemies[i])) {
+				enemies[i].destroy();
+				enemies.splice(i, 1);
+				heroBullets[j].destroy();
+				heroBullets.splice(j, 1);
+				break; // Exit the loop after destroying the bullet to avoid errors
+			}
+		}
+		if (heroBullets[j] && heroBullets[j].y < 0) {
 			heroBullets[j].destroy();
 			heroBullets.splice(j, 1);
 		}
 	}