adds game over credits (#74)

## Changes
- Adds game over credits

Reviewed-on: gymkhana/gymkhana#74
Reviewed-by: Eneko Nieto <eneko@eneko.ovh>
Co-authored-by: oier <oierbravo@gmail.com>
Co-committed-by: oier <oierbravo@gmail.com>

gymkhana/items/inventory/turno_cocina_cuerno.esc

@@ -15,10 +15,9 @@ say player "Parece un cuerno de algún animal. Lo usan para llamar a comer."
   walk_block player puerta_cocina_start
   set_angle player 180
   stop_snd
-  > [turno_cocina_ingrediente_patatas,turno_cocina_ingrediente_ajo_en_lentejas]
+  > [turno_cocina_eneko_cata_ok]
     play_video res://gymkhana/videos/turno_cocina/cuerno_epico.ogv
-    # TODO Credits
-    show_menu main
+    change_scene res://gymkhana/rooms/turno_cocina/creditos/creditos.tscn
     stop
   play_video res://gymkhana/videos/turno_cocina/cuerno_antes_de_tiempo.ogv
   play_snd res://gymkhana/sounds/music_loop.ogg _music