The Raycasting Game Maker is a free easy to use game editor that creates simple raycasting games in the style of Wolf3D. The finished game needs only two files to run, an executable and a pak file with the game data. The game runs in Windowed- or Fullscreen Mode and supports 16 and 32 bit color.
So, this game creator is not professional, but in it you can make a full game with enemies, levels and your graphics! For beginning game developers like me, this is a good tool despite its limitations.