I really like your style and use of coloring, especially on the monster and the girl's eyes! The only thing I would suggest would be to smooth out some of your lines, especially around her left shoulder and her knees to create a more rounder, smoother appearance rather than a blocky one. This is probably just because it's a WIP, but I think smoothing those out will compliment your colors.
I'd also perk up her left boob a little bit just so that it matches the fullness of the other. Right now, it looks a little squished to me! Let them puppies breathe!