The background itself seems kind of...I don't know, almost lacking something. The colors don't seem to match the action of the character that you display on the wall; I mean, purple seems more of a gentle color to be associated with flowers or pretty things, not swords and blood. But maybe it's just me...?
The drawing you put on there is cool, though; detailed, and well done at that (even if it is a little scary ;) ).
