this artwork is rlly nice, but i agree with chris about the face. idk if you sketched this out or not, but the hair seems to be resting really close to the forehead (while as in the original theres still some space inbetween.
the head also looks a bit wonky and a bit disproportionate. if you ever tried imagining your characters bald (weird but helpful), it might help with drawing out the hair so it doesnt sit too close to the skull :b