Click the letters or press space, a, b, c, or d. A will stop the music, and space, b, c, and d will play it.
If reading notes is your power, what are you without it? -Socrates Credit to Scratch and Rick Astley. Things to watch out for: The Rickrolls may be cut a bit short; I don't know why that's happening To play Rickroll, press B first, not Space. The thumbnail is not aligned with the project, so when play is pressed may move a bit to the bottom right corner. Not a bad thing.
