Hi, thanks for your answer, for sure i know we can launch linux games on Batocera, i do it some times, and without script, it is already ready to use in ports games that can launch a .sh file.
But it is not my goal, my pico8 games are all in pico8 directory, ready to launch with the readl pico8 exec. It is the best way to play them, and have all of them in the same place. It's why i always ask creators to share a PNG game format and use the real engine :(
I understand you use a modified one, but i don't really understand why ... when i see Doom on VRRacing or so many other games that tric the official pico 8 engine to work... and it works :) But maybe it is hardest to release, i don't know ... ?