Way better job that I could ever do, but I'm always a critic, so here goes: he looks a bit off-balance (not a big thing, just one of those little OCD things I have), his back is arched kinda wierd, and it could use a bit more texture, but other than that, great job. I actually like the head; plenty of artstyles use plain circles for them, and in this instance I'd say it's used pretty well.