Okay, thanks for your notes.
If youre willing to take some CC. My main thing with the three of these that youve submited is they all feel very flat and seem rushed. Its obvious that you have incredible skill but I think you should have put a bit more time into each one. Do some style research or practice with tricks like hand implemented anti aliasing and dithering. They'll help you gain that much needed deapth to your work.
Otherwise keep it up, these will most likely be accepted into the gallery.