Cool sprite, Its hard to comment on, it seems quite well drafted to me...
one thing I could comment on is his character, like his attitude and acting, I guess he's a 'good guy', but he seems like a pushover. Maybe its his stance, he seems quite rigid and nervous, ecspecially his lower body and legs. Maybe its the way his legs come out of his hips: perfectly level with the view, perhaps you could rotate his hips just a bit to add more realism. The pose seems like its in the middle of a movement like shifting his weight from one leg to the other or something I guess
just some thoughts, actually here's an edit to illustrate my point, I hope you don't mind, it was a blast