Now try playing with your the keys on your keyboard [D,R,F,T,G,H,U,J,I,K,O,L]. Make sure your cursor is focused on the piano and not the code editors!
Uses the neato plugin Beeplay.js.
I've played ridiculous amounts of Mary Had a Little Lamb today.
the changing background made it look more cool...
Need to know how to enable it? Go here.