I loved the artistic feel for the game. I'd also love to know what the equation is that you're using to generate those curves. (Something involving imaginary numbers, I'd imagine). One thing I didn't like was having to hunt for the clue orbs after you make your guess. I just ended up clicking randomly to get them, and I feel the challenge of the game is really about deducing the right notes, not hunting for the orb clues.
Your game doesn't run on Firefox for some reason. I had to use Chrome to play it.