This is a great game, and the piano isn't really that hard after you figure out the right way to count the codes.... as for the easter egg, I've tried everything with the piano. I've used the numbers that would correspond with Kane and Rosey's names, I tried entering the date, in multiple formats, into the piano keys... For others saying it's obvious, it's stumping me. I'm going to keep trying, because Insanity is the only medal I haven't gotten, but it's really starting to bug me. >.> Gah, I'm going to hate pianos after this.