Awesome sauce.
I really like the simple yet complimentary background (that's always a point of weakness for me. The zippers are really cute too. They make a really nice contrast with the demonic face. I also like the way you gave this guy a sort of gravity of his own. It's as if his belly wants to go to the right, or as if he's sort of leaning. Anyway, I really like it. Great job! :D