HyperPixel4 support in pico8

Hello everyone. I’m trying to install a minimal linux system on my pi 3 with only pico8. So I installed the driver and copied pico8.
The touchscreen works well under X desktop, mouse and keyboard too. But my purpose is to not launch any window manager at all.
But if I start pico8 from commandline, touchscreen doesn’t work at all.

I could have launched pico8 with startx pico8 but this time, nothing works, keyboard, mouse and touchscreen.

Could you provide some wise wise advices on this ? I try desperately to make it work for hours.