I'm not really an art expert and I don't know what I should criticize bc I like your art & your style. The only thing I can say is maybe try to shade with dark colors like dark blue or dark purple instead of black and light with a white yellow than with a bright white then it looks a bit nicely. I hope I could help with that :')

re// yoink

I hope you don't take this personally, but I think your hands could use some work. =/