WARNING: Blinking background can cause seizures.
Maybe someone of you want to use this music in your own game.
Music from Cheetahmen game from famous Action52 unlicensed cartridge.
Original music: http://www.vgmusic.com/music/console/nintendo/nes/action52cheetahmen.mid
Midi to Pico-8 converter: https://github.com/andmatand/midi-to-pico8
About note representation in memory