Lovely game! Is there a way to play in windowed mode? Or a settings to mess with the volume of the music? I don't mind editing a file if you can point me to the correct one.
Try holding down the shift key when opening the application; that should open the Unity resolution window, which would allow you to play the game in windowed mode. Hopefully that works for you. This game was created on a very short schedule, so I didn't have a chance to put in very much in terms of configuration settings. I hope to have a chance to come back and update this game at some point, and I would want to include display settings and volume controls in that.