I can't tell what the graphic is above his head. If it were dancers, or girls, or something that I could distinguish, I'd like it better, which disturbs me about myself, because usually, I dig the abstract. In that case, however, I'd like a more evil looking devil.
I like the head, I think it looks good, but leaving it bright red renders the top area of the design useless. You may as well chopt that top portion off, raise the devil up so he isnt sitting so low on the shirt, and have him staring off into nowhere.