itch.io

go to the game's data files, and find "Audio", if you don't find one, create one.

next, put your mp3 in there and run the game.

click the button that icon: music note

select whatever room you want, not play button, but the right side of play button. It should give you a song you add in the game data.

select the song you want.

don't forget, click the "use this playlist" checkmark.

try it.

-Ellio :l