Ignoring the fact that it gets past the 16 color limit, that dithering gives me some neat pc98 vibes.
There's some banding in some areas (mainly, the humans' arms, but making arms without banding is hard so it's not a major issue) and the shading feels inconsistent in some parts (the contrast between the dithering in the floor and walls vs the much cleaner shading in the couch's arm rest), but it's a very solid piece anyway.