Hi,
I am probably quite late to the party, but since discovering pico-8 recently I've been really impressed with the platform.
Like many others have done I am working on my own Pi Zero based arcade console to play Pico-8 games, mainly for the fun
and challenge of building one.
I've been able to use Pico-8 via Retropie (using the paid pico-8 executables) and get it fully working, although I don't like the slow boot-up and slow performance on a Pi Zero.
I found that using PicoPi (after finding posts on it like https://www.lexaloffle.com/bbs/?tid=35926) is much faster to boot and the games run better (with Retropie some pico-8 games are stuttery).
However I can't work out yet how to get my audio via USB working with PicoPi & Pi Zero. It seems to have HDMI audio by default which isn't what I need.
Many thanks in advance for any pointers!