Thank you so much for giving it a try and for the detailed feedback! 😄
I think you may have run into one of the rough edges of the current alpha prototype. After creating a room, the password is generated automatically and displayed in the room window, but it's clearly not obvious enough if several players have missed it. That's definitely something I need to improve.
I'll be spending some time after the jam polishing the UI and overall user experience to make the process much more intuitive. And thank you for the kind words about the music and aesthetics — I'm really happy those parts worked for you!