Animal Squad! I'm guessing this was originally made for Ludum Dare 35?
Anyway, it's cool. The animals all have their uses, and you clearly have some level design chops that make it all work. The cat wall-sticking sprite brought me great joy.
A few things that you might want to update if you want to polish this a little more--the tiny gap in level 4 (I think the idea is to stick to the wall as the cat, turn into the ball, and then go through) is hard to get into, I found myself floating next to it a lot before figuring out I could jump while floating to right myself. Also, sometimes I had to navigate later levels by guesswork, which is fine, but a minimap or a teensy bit more viewing space would be very nice.