I like this, I think it's happenin'. Reminds me of Helm's . . . uuhhh, what was that dude again . . . viking, gladiator, warrior thing guy, from ancient Greece or somethin', Helm used only RGB and black I think it was, did some great color mixing, etc.
This reminds me of screen printing, specifically half-toning. You should try a full-color non-pixel art graffiti style version done with half-tone dots. Graffiti pop-art, old school comics, etc-type concept.