I'm stuck at level 9. The only thing you can do is mimic the butterfly, but then what?
Edit: I just did that. I have no idea how that works, but I did that. Also, this game is great.
Edit 2: I just finished the game and I've never seen something like this before. The core concept is simple, but the different ideas like combining animals, changing paths and splitting a lizard in half make the game not get boring. I just wish it was longer.