FYI, the demo works perfectly fine under Wine (Whisky) Rosetta emulation even on M1 Mac 16GB. 60 fps stable in FHD. Haven't tried in 4K yet, but my guess is it wouldn't be much different – the graphics are pretty simple (if really nice).
ETA: Works just fine in 4K. I'd guess it should run nicely under emulation even on the very basic M1 8GB.
And yes, looks like a pretty cool game. The banter in between missions is nice.