Lose the sword, keep the gun. Sword's making him look tacky as hell. I like the Colors and simple design, but are you going to do more with rendering the character, or will the whole scene be in this flat style?
Looks as if you ARE going to keep it simple block shading, and whatnot. So in that case, I'd work on smoothing out those jaggies that are very noticeable on the red portions of his clothes. Also, the shoes need some work: They seem like he has fat ankles, and flat feet...like a duck. The legs do look kinda' wonky. Well, the back one, maybe. Probably push it a little more to the left to fit the pose a bit better. Looks bare bones at the moment, so I'll hold my tongue until further work is done.