Not bad, but it could definitely use some work. As was pointed out earlier, the moving arms/legs look odd on a torso that doesn't move at all. When you walk, you're constantly falling and catching yourself, so there should be a bit of up/down bob to the torso as a whole. The timing in the loop seems a bit off. He brings his arm forward normally, then moves it back more quickly. You might want to pace the forward/back swing more evenly.
The legs don't move like walking legs would. It looks like you're animating the way you think a walk looks rather than how someone moves when they walk. They aren't extending their legs and pulling them under themselves, they're pushing off, falling forward, catching, pushing, falling, etc.
