Bug fix in Maze without Monsters

I'd just like to tell you, that a bug in the stone maze (the one without monsters has been fixed). Before fixing this bug, you could walk out of the maze, but you did not win the game. Also a Generate Button has been added to the "Stone - No Monsters Maze" and the "Tutorial Level".

Please let me know if you find any other bugs. You can report them by using the Google Form here: https://docs.google.com/forms/d/14AZP0cr0V6I9lvc4m2cTACp0qqiXwajnfs3CbZEnhSQ/edi...

Enjoy playing the game, any feedback would be appreciated! :-)