I liked the simple mechanics of it being used to facilitate interesting gameplay. The graphics looked nice and when the game got going, was very intense and I was on the edge of my seat.
If you wanted to improve, I suggest having way to change skins from the restart screen, backing out to the main menu to change that one thing takes a moment and could be streamlined. I also think you could speed up the beginning some to get to the real core of the game.
Overall fun game!