hi! the file for the song must be in .ogg format otherwise the engine won't read it. You can easily convert it online. I put mine in audio>bgm. The name of the song file doesnt have to be the same name as the .json file
i actually embarrassingly enough misspelled the data file as "Rythm" instead of "Rhythm"; it sure does help if you spell things right ^^' but tysm!
