Each type of animal has its own set of abilities which must be used to solve environmental puzzles in the game. The sheep is one of the first animals you encounter. It has no attack, but it can glide slowly down, floating like the little puffy cloud that it resembles, which lets it cross long gaps easily. Also in the early stages you can become a dog which can jump and bite. Hyenas have contagious laughter which causes area-of-effect damaging hysteria. Pigeons can grip dormant robots and carry them from place to place. You get the point.