The Wine file picker that appears when you press the folder icon with "MP3" written on it (I'm presuming it is meant to select background music) does not let you pick files. Double click, right-click + open, and right-click + select all open the file in Wine's default application for the file type.
I do not know whether this works on Windows.
This issue aside, the game works perfectly. Should it be fixed this could be turned into a whitelist request.
Reproduction
Have an .mp3 file on your system
Launch the game
Attempt to select the mp3 file in the Wine file picker that appears when you click the mp3 button
Compatibility Report
System Information
I confirm:
steam-939620.log
Symptoms
The Wine file picker that appears when you press the folder icon with "MP3" written on it (I'm presuming it is meant to select background music) does not let you pick files. Double click, right-click + open, and right-click + select all open the file in Wine's default application for the file type.
I do not know whether this works on Windows.
This issue aside, the game works perfectly. Should it be fixed this could be turned into a whitelist request.
Reproduction