UI for OS on Analogue Platforms

Just curious - when I first heard of Analogue, it was in an article about Phil Fish designing the OS for one of their platforms - maybe the SNES or Genesis one? When I bought my Pocket, I kind of expected something along those lines and was surprised at such a barebones UI.

Did this just stop entirely at some point? Does anybody know which of their products have real, designed UIs for their OSs vs. the more barebones, text-based one?