Kelvin Shadewing's Pixels

[Kelvin]

This is a commission I've been working on. So far, I've gotten the client's approval on everything, but I feel like it could still be better, particularly on the squirrel's muzzle; the shading seems off to me, but I can't get it to look good. Also, that's not Midi; he's just wearing a beret to cosplay as Colonel Campbell. Any ideas on how to fix it? As for the color and the aspect ratio on the vid boxes, the client requested it be in color, and for what he's paying me, I'm giving him the full face instead of cramping it into narrow boxes, since they have wider faces than humans which wouldn't fit right.