I can't get past the first stage of your game. I think there may be a bug or something, I've tried refreshing the page a few times and using different browsers (chrome, firefox and IE) with no luck; the game stops scrolling down with the player character at a certain point. The collision detection for some of the walls seems to be a little bit off and I'm not sure where to find any levers to flip. That aside I think this a good start to a maze game and would be really interested in seeing your level designs when I can get the game working.