I like the shades and texture and colors just like they are. And even though the anatomy is all out of whack, there's something I like about that, too. It's like he's made of modeling clay or something. I think the lack of colorful "blue and yellow" hues adds to that feeling.
Tremulant said everything I would have about the anatomy, so I won't double that, but like I said--there's something enjoyable about his wobbly, disproportionate, gingerbread-cookie-gone-wrong look.
This would be outstanding in a game with other similarly styled characters and backgrounds. I'd love to see your take on a cave man.