Nice piece, I really like the colours and the mask design. For me there are a few things that stand out. One is that the perspective of the face looks off, the snout eyes and ears would all be parrallel and so they should converge to the same point. Another issue is that the bright details on the left are distracting from the focal point (the face) I did a quick overpaint to show you what I mean. I adjusted the perspecitive of the face and cropped the image so that the face is no longer in the middle of the composition and toned down the bright areas other than around the face. Just my two cents I'm no expert so take it with a grain of salt. Nice work, keep it up.