Added configurable weapons.

AlientAttack.MonoGame/Things/Bullets/Bullet.cs

@@ -1,8 +1,11 @@
 using AlienAttack.MonoGame.Things.Items;
+using AlienAttack.MonoGame.Things.Muzzles;
+using Microsoft.Xna.Framework;
+using System;
 
 namespace AlienAttack.MonoGame.Things.Bullets;
 
-internal class Bullet(float x, float y, float xVel, float yVel, Sprite owner) : Sprite(x, y)
+public class Bullet(float x, float y, float xVel, float yVel, Sprite owner) : Sprite(x, y)
 {
     protected float XVelocity = xVel;
     protected float YVelocity = yVel;
@@ -32,7 +35,9 @@ internal class Bullet(float x, float y, float xVel, float yVel, Sprite owner) :
 
     public override void OnCollision(SpriteCollisionContext context)
     {
-        if (context.Sprite is Bullet || context.Sprite == Owner || context.Sprite is Item)
+        Sprite sprite = context.Sprite;
+
+        if (sprite is Bullet || sprite == Owner || sprite is Item || sprite is Explosion)
             return;
 
         IsDead = true;