Add debug menu, add ability to load next floor or spawn item

Zennysoft.Game.Ma/src/enemy/Enemy.cs

@@ -87,7 +87,7 @@ public partial class Enemy : CharacterBody3D, IEnemy, IProvide<IEnemyLogic>
     _lineOfSight.BodyEntered += LineOfSight_BodyEntered;
   }
 
-  public void OnProcess(double delta)
+  public override void _Process(double delta)
   {
     if (CurrentHP.Value <= 0)
       return;
@@ -159,7 +159,7 @@ public partial class Enemy : CharacterBody3D, IEnemy, IProvide<IEnemyLogic>
     _knockbackStrength = 0.3f;
   }
 
-  public void Die()
+  public virtual void Die()
   {
     SetProcess(false);
     CurrentHP.OnNext(0);