I think it has more of a soul from early mobile android games than gameboy ones. Don't get me wrong, i don't think idea of game is bad, it could be done well but i don't feel gameboy soul in here. Neither in gameplay, neither in graphics, neither in soundtrack, neither in UI/UX. And from my interpretation of rules, it would be better to improvise some song than use existing one - or use the chords and rythm but make it not recognizable. I like the joke in here with "letting down" but thats not quite what i expected from this gamejam games. Nevertheless good job on finishing it while having holiday - i and propably many more of us here, suffered smillar time problems and project restarts :) Have nice day and good luck.