Well this was a colorful one! :D Nice contrasts. Can't really read that expression, but it seems it's either ego or joy or a bit more of a forced smile? Wonder which you were going for? Ambiguous expressions are cool though. Mona Lisa vibes.
I think the ring/decor on the horns would look better if it actually went around the edges - it's more like a sticker than an encompassing thing when they run them over, and all forms aren't all perfect here, the right horn goes around a bit like a snake; changing shape along the way. ;)
Little bits you could polish but the design overall is pretty cool. Creative design.
-cd-