That's really good. It took me a while to notice that you also got the feet and shadows. The only real mismatch is the shading on the top-center of the breastbone of the gorilla, as that is still covered by the head's shadow, or the feet should be a bit higher so the joint is more like the gorilla's, which I think has more articulation of the toes so it's ankle is really more like a wrist. But it took me way, way too long to notice that.