uhm, smjjames, You noticed the thing has 8 notes, placed exaclty like you have your notes displayed, so you don't have to mind the colours, just the position of what blinks quickly.
Oh, and if you want to know what happens when beating him again, you just get food. First I got a Sea Cake, then a Small Bone and then a Small Egg, I could guess that you get better thing when you win after eachother or when you win more often, but i didn't want to go through the trouble of beating him over and over.