I like the concept. Defnitly good start. Anyways, If it could be a little less simplistic? Umm. Not to say that isnt good, what I mean is if you see grafiti on a wall it has many effects on it, cool stuff like that, etc. etc. As for the face, possibly less simplistic again, thinking about it more and more I think maybe either an emo haired person could fit this set, or possibly a grunge/demon head?

all are these are just suggestions. P.S. as a secondary color, Use void if neccesary.