The game uses at least two special character/savegame names: TutorialTux (for the tutorial) and MapEd (for map editor).

Yet the game allows you to start a new game with those special names as well. This is problematic as those special savegames can be silently overridden.

I suggest to outright disallow the creation of games with a special name like "MapEd".

(Tested in version 1.0)