Glad the game ran. There is indeed no audio.
Was this on linux or windows? Did you run the game from the command line? Or did a terminal pop up with debug logs? This isn't Godot btw.
Was on windows. Ran the exe which came up with the game and the debug log. My bad, I threw the demo in my godot folder and retardedly read the filepath. Also the game uses 20% of my CPU just to run the main menu.