I got through the demo fine. I then got the main game which reinstalled everything. I was at the point where I go to the forest entrance and then my graphics to wacky. If I go back into down it's fine, but in the forest all I can see is a giant glowing thing and black. If I move my cursor into the black it leave a permantn trace of the hand. Even the walking gingerbread man leaves a rail of himself as he walks. Real frustrating.