Cool game! I like the mechanic of going back the way you came after death. As said from another comment, there is the A and B problem when is should be A and S. The only other issue was that there was some thing that bounced me to the other direction at the beginning of one of the levels after you die, and my character went on without anything to take me back. If there was something back there, it was taking too long to get to it. Aside from the problems, for as far as I got, it was fun. I kept getting confused in the ghost mode because I kept accidentally avoiding the obstacles that you could move through, which added to the difficulty of the game, but I found that fun. The speed ups and the slow downs were pretty nice as well, it helped ease around some obstacles, or made the level quicker to pass.