There's no option to exit a song or go back to the main menu if you don't want to finish a song other than that 9/10.
Sorry for the late reply! I'm working on kind of a haunted house spooky game you can hit me up on twitch.tv/adustyoldmuffin and we can chat from there. :)
Hit me up man :D
I'm looking for a pixel artists who want to participate in this jam! Message me on here or shoot me a dm on twitter @adustyoldmuffin.