I feel the style is how the artist envisions it to be. The style is not totally realistic and in my opinion made to look super deformed (aka chibi-esque) and they pulled it off really well. now if they were going for realistic it's a little off, but my opinion of the overall impact is really appealing and cute. the facial features are well done and everything else is wonderfully done. This is a great work in my opinion, keep up the good work. I would just suggest to look into chibi characters a little more and do your research.
Thanks. I believe I'm good with chibi style but for icons I still need to practice since it's really small and has huge pixels. But I hope to get better