I don't have the full version yet, but in the demo I initially had problems mapping buttons because when I changed one button, I took the function away from another one leaving one button unmapped. If I had tried to exit, the game would just remap the buttons the way they were! Maybe this is the same problem that you are having. Make sure all the buttons are mapped. Good luck, and btw, how is the game? I am interested but I didn't like the demo. Is the demo a whole level, or just a piece?