Alien Fan Art

I don't know what to do for a background if somebody can help me out with it thank you

Other than the unfinished background i really love the way that this came out. its officially my favorite digital piece ive done... even though i haven't done that many go figure lol since ive only had it for almost a month now

Edit: I added some gradient and some touch ups on some of the highlights tell me what you think now?