Oh, now I see. I thought you meant specifically more painterly drawn pixel art. Which I'm sure exists somewhere. But Primordia was painted digitally in high res and then scaled down, wasn't it?
I actually went reference hunting for the coffee shop interior, using screenshots from the show. It's weird, it feels as if every episode the shop has an appearance, they drew another set of backgrounds. And those tend to be very inconsistent in both layout and perspective, sometimes even within an episode! Which is why I think that, instead of recreating screenshots from the show, it might just be better to sketch one possible layout, stick to it, pick some shots and just draw it myself, limited as my experience drawing backgrounds might be.

I did start coloring the outlines, which might help make it look a bit nicer. But i think I might try drawing the lines freehand with the tablet.
I actually went reference hunting for the coffee shop interior, using screenshots from the show. It's weird, it feels as if every episode the shop has an appearance, they drew another set of backgrounds. And those tend to be very inconsistent in both layout and perspective, sometimes even within an episode! Which is why I think that, instead of recreating screenshots from the show, it might just be better to sketch one possible layout, stick to it, pick some shots and just draw it myself, limited as my experience drawing backgrounds might be.

I did start coloring the outlines, which might help make it look a bit nicer. But i think I might try drawing the lines freehand with the tablet.