Hi hi! Love every panel! So much character in each of them and linework is really top notch! I personally wouldn't change much,only try to seek a better push. I marked it with a multiply layer where shadows can be placed but I am sure you will determine the light source before diving in. I would try adding colors in the background or patterns that are tied to characters. For instance, I know that Flamingo is mostly in pink so I replaced the gray background with a pink one. Maybe some of them can have very dramatic light or full comic coloring render. It can be tough to say when we are truly finished with artwork so that's why we need to push limits from time to time. Experiments are best for it so go have a blast with it! Hope it helps! | Artwod Feedback