Very nice I love how clean the shading is, I do agree with Manupix about the arms/fists though.
This is nicely pixeled, but not very readable in the arms/fists area which should be the focus.
The problem is mostly with shading: arms and fists should cast shadows on the chest (much more than they do), on each other, on the face, as they do in the ref.
Moreover, mirroring the arms doesn't help because one being in front of the other, they can't have the same angle, muscle detail etc (ref, again).
The forearms appear kinked midway to the wrist, that must hurt ;)
The torn fabric at the shoulders is a nice touch but shouldn't have inside outlines which only drive the viewer's eye away from the centre.
@Manupix Thank you! and I appreciate the feedback. Your critique is always super helpful.
@storm Thank you.
@zlexcalin Thanks, Glad you like it.