Is it possible to change which buttons count as inputs in pico8 for the gameshell? I would much rather use the bottom and left buttons.
Have you tried generating a SDL controls file?
You will need to run SDL controller map through ssh for that. Here’s a bit i got from a guide for another linux handheld that should work with the game shell.
You might have to build SDL yourself for this to work
./controllermap 0 >> /home/PATH/TO/pico-8/sdl_controllers.txt