The VG Resource

It's supposed to be a low kick for one of those crazy moving characters, yeah?
Eventually it gets clothes, but 'til then I'm working on anatomy.

First off, the kicking leg is (or at least seems) much longer than the supporting leg. Also, the arms seem to be bent awkwardly.

I'm possibly the only one of the forum who can bend my arm like that, and that's not a testament of flexibility.

Either make the limbs slightly shorter (except the bent leg) or make your torso slightly longer and enlarge the bent leg. His neck is broken, if you can bend your neck in excess of 90 degrees, you've snapped your neck and you are dead. Also inertia would pull up the right side of his boy (his right side, our top side) as he kicks. Also you've lost the shoulder muscles, and the rib cage is shorter than it should be.

Hope I helped.