I think you did this too hasty as there are a lot of colors flowing out of the lines. Take a good look at the bottom right, and it doesn't just stop at his hand. I also think the darkness on edward himself should be a little less, unless his arm creates light or something but I don't think that was the purpose of it.
Overal design is lovely, I honestly think you should give the wallpaper a last check-up for minor mistakes before submitting.