I’m glad you like the game.
As for the music, I sadly have no idea. Some of the music I use is downloaded from youtube and I make sure to bookmark it. It was called “Royalty free dark choir”, but the video was removed some time ago.
And for the workout thing, that’s an exploit. I will fix it at a later date, It’s not that high on my priority list. You can only do this exploit if you finish the game atleast once and at that point, I have no problems with people cheating or exploiting the game. Have fun.