When you post something here, and you want to hear a critique, you have to say what you want to be critiqued (style, animation, specific part of image etc.) so it will be easier to comment on your work.
For me, the most strange thing is, that you use both pixels and gradient for your highlights. Gradient or soft edge brushes can't be used in pixel art. Highlight on hair should have shape of the hair, not just random pixels that looks like dandruff. Also I'm not sure if in-game character shoots in game or trough glass of arcade machine.