Add final level, start on cutter weapon

Scripts/CutterShot.cs

@@ -0,0 +1,12 @@
+using Godot;
+
+public partial class CutterShot : Projectile
+{
+   [Export]
+   private PathFollow3D _pathFollow;
+
+   public override void _PhysicsProcess(double delta)
+   {
+      _pathFollow.Progress += Speed * (float)delta;
+   }
+}