I can't criticise the content of this illustration because this is a commission and because there is nothing glaringly wrong with you decisions about the style or aspects of this character, nor is there any structural issues present within the piece. this being said, i have gone through some of your recent artworks and I think that you could benefit from putting some sharpness into your focal points, because I feel that most of you work has a lot of fuzziness in it. this is of course hardly a bad thing, but I still feel your pieces could benefit from some harsher lines in the faces and other important objects.
additionally I think this piece has some problems with scale. to me there is some ambiguity about his size which you could easily solve by adding some houses getting destroyed down there.
and lastly, i would think twice about using chromatic aberration in your pieces because i don't think they add anything to the piece and may have the unintended consequence of making your illustrations look dated once this fad, and I do think chromatic aberration is a fad, ends.
your pieces are quite nice, and I'm not here to degrade them, but these are my suggestions for further improving your work.
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