Well I lack enough to use in a real critique. But from my uneducated perspective perhaps more motion could have been in this piece, it appears a bit flat. It's an interesting idea, but not an outstanding piece. Like the texture the paint gives his skin, very supernatural.
I would have liked to have seen this image in in landscape mode without the arms cropped off, and cropped at the tip of his nose. As it is, my eyes are naturally drawn to his face. And due to the colors used and his expression overpowers the rest of the image.