This is cool! I especially like that you take damage and shrink when colliding with the wolves. I didnt notice this at first.
One thing that might be cool to experiment with is redrawing the slime sprite at a higher resolution as they grow. (At the moment you are just stretching the sprite so after a while the different in pixels per unit size between the character and the rest of the art is a bit jarring) But obviously thats for later and not this round :)