Additionally for anyone else wanting to run a desktop build of this game, before there is an official one, theres a not so good D.I.Y. solution to it:
- get a godot 3.5 export template for your platform of choice
- By using your browser debug tools and going to the network tab, find where it gets the index.pck from and use that link to download it normally
- rename the export template to index.(whatever your platform does for executables)
- Place both files in the same directory and execute the template
This has worked for me on linux and fixes the audio issue almost entirely.