Hello!
I’m really sorry, but I’m no longer developing this game. 🙇🏻♀️
I’m afraid that all I can advise is going into “Preferences/Options” and toggle the volume from there, or turning down the volume on your computer.
This was definitely an issue with my earlier works (I think Party Favors had this problem too...), and it’s something I’ve been trying to fix for my later games.
Again, I’m really sorry I can’t help more.