Mike mentioned
PICO-8 way back in
July 2017 but I recently stumbled on it again and ended up purchasing it. It's pretty amazing and even runs on a Raspberry Pi!
It has tools for editing code, music, sound, sprites, maps built right into the console. Check out some of the
Cartridges for it. Just click on a screenshot to run them in its HTML 5 engine.
They include a release for Raspberry Pi which would be perfect to run PICO-8 on the
Picade.
It's fun to see what people are doing to push this machine from
graphic artists to
musicians and
coders.