^ I definietly want to figure it out as well. I've been playing Ayu's music a lot lately on the piano, both with sheet music and with figuring out new songs by ear. I'm going to start to work on "evolution," so if I come up with anything I'll let you know.
But I'm curious to see if anyone has it, too!
(What I'm really itching for at the moment is "Marionette." @_@)