The proporsion of the face look good, but the controls make the cheaks feel flat.  I like the burst from the right eye (left of frame) and its reflections on the face but the whole face flickering seems to have no reason. the reflection of the red getting across the bridge of the nose from the right eye seems far feteched unless that hole is raised very high above the nose. I'd like to see the red tint from the eye brought out more. I think it should stay more icolited on the left side of the face (right side of the image) cause of how the the human face curves.

Maybe I shouldn't be so critical for my very first post on any art here ever... particually to a high level well respected pixel artist.