Exactly what I thought, everyone misses that one.
Nice work!
Thanks :-D
I may have a theory for the menu notes. But maybe I'm imagining things. The game takes place during the Christmas period and it is this detail that makes me say that my theory could make sense.
I think the notes made by the 4 menu buttons (from top to bottom) correspond to the first 4 notes of "Carol Of The Bells".