welll

good shading and shape but the angles dont make sence inthe face the heads shaped facing towards the right but the eyes are sized facing the left and the mouth is the same but even more dramatically

Meh

I'm guessing this is a copy and if I'm wrong I apologize, but the dark aspect of the piece demonstrates good control at least on the shading end, I can't say I'm a big fan of how you really zoom in on him, to me it really simplifies the piece and kind of takes away the skill level demonstrated. Maybe try a full figure piece next time and see how you do with that.