Ran through this game a few times and I can say without a doubt: it needs to be longer!
The mechanics of the game feel like a very simple idea at first: move in the pattern of an animal on the screen to change into that animal. With this in mind, you'd think you're the only one that can actually use that mechanic, but you quickly find out that other animals can do what you do, lending multiple of their terrain abilities to you at once! Mixed in with the fact that there are 5 types of animals, 6 different terrains, and a very easy to medium difficulty of gameplay in this version of the game, and you have yourself a very well-thought out puzzler. The part that makes this game just leave a desire for more is the ending where (***SPOILER***) you end up splitting into two at the last level. Not to mention that there's a secret dev room that teaches you the mechanics without directly teaching you the mechanics! (***END SPOILER***)
I couldn't find any glitches or bugs through my playthroughs, but I could see some possibly happening with the lizard in the last couple of levels.
All in all, this is possibly one of the better puzzlers I've played in terms of mechanics, difficulty, and enjoyment in a while, and I'm hoping that the dev will consider releasing a second game or extending this one!
My playthrough: