Smalls suggestions: allow to look a bit further. The screen is pretty close IMO, and you often don't see buller/enemies coming from below. I lost often some lifes because of that.
Put the face close-ups in the gallery too.
Make that the ranged enemies don't shoot immediately upon spawning. It would make less frustrating when one spawn just next to you and snipe you. I would also suggest that you add a small flashing or animation before they shoot to avoid being sniped when finishing them (Since you need being close to devour, problem that isn't present in other shooters.)