About 10 years ago, the Super NES had a game called Mario Paint, which had a component on there called Composer, in which the player could arrange notes with a Super NES Mouse to compose musical scores; while I personally never composed anything other than discordant rhythms, this fellow has managed to put together the Mario Paint Composer rendition of "Still Alive" from Portal:
I believe you meant "Still Alive" by Jonathan Coulton from the game Portal... not "Staying Alive" the 70s disco anthem.