Too be honest I don't know ways for you to improve it...but one thing that could be an option is to add a little something to the left...since it sorta looks dead compared to the rest of the tag.. ...but i really like the tag....mainly the feel to it... Great work!
Give him some behind the body effects, its been along time since ive seen people do that sprite style. i remember I got into it about a year ago with this one(somewhat). not nearly as good tho.