Pico8 games on RPi 4 runs very poorly
Hello! First off, thank you for working on this project! It's much appreciated. I first submitted an issue to the batocera issue tracker and they informed me that this was the project emulating the pico8 platform. 

I'm trying to run Pico8 games on Batocera on a RPi 4B 8GB and I experience great distortions, both visually and the audio, if I'm able to boot the cartridge at all. Apparently it runs quite well for others so I wonder if it might be something due to the ARM architecture and if that isn't supported? Celeste Classic manages to boot but lags and has slightly distorted audio, Tiny Fisher however has such great visual distortions that it's unplayable (find the cartridge [here](https://www.lexaloffle.com/bbs/?pid=51637)).

If this isn't a known issue, please let me know how I can help troubleshoot!