The demo keeps running without bringing up a screen to play the game. It just sits there doing nothing.
System: Linux Manjaro, using Steam's Protons 4-7, including Proton Experimental which uses to handle RPG Maker games flawlessly, nvidia GTX 1650.
It's probably related to the bug reported just below this one.
EDIT:
I got me the payed version now, which showed the same problem. A bit of research revealed that the problem sits in the fact that BlueToothRadio( ) can't be called properly.
The other games that I have from this dev don't have this issue.