Added other bullet classes. Add plasma pickup audio.

AlientAttack.MonoGame/Things/Bullets/LaserBulletSmall.cs

@@ -0,0 +1,27 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using System;
+
+namespace AlienAttack.MonoGame.Things.Bullets;
+
+internal class LaserBulletSmall : Bullet
+{
+    public const int Width = 6;
+    public const int Height = 18;
+
+    public LaserBulletSmall(float x, float y, float xVel, float yVel, Sprite owner) : base(x, y, xVel, yVel, owner)
+    {
+        BoundBox = new(0, 0, Width, Height);
+        Damage = 1;
+    }
+
+    public override void Draw(SpriteDrawArgs args)
+    {
+        Texture2D texture = args.Content.Load<Texture2D>(@$"Sprites\Laser_Small");
+
+        float rotation = MathF.Atan2(YVelocity, XVelocity) + MathF.PI / 2f;
+        Vector2 origin = new(texture.Width / 2f, texture.Height / 2f);
+        
+        args.SpriteBatch.Draw(texture, Position, null, DrawColor, rotation, origin, 1f, SpriteEffects.None, 1);
+    }
+}