This engine allows the player to change to a zombie after getting a game over, and then to a ghost, and then back to a live human. While this could be an interesting gameplay idea, it's presented with numerous glitches in this release and doesn't actually give the player much to do with the engine. You'd have much better luck coding your own engine that works like this, and really should do that anyway, but that's an entirely different issue. Two stars for having a cool idea.