I've gone inside the whale and found a room with a locked away pearl and an octopus that sings a song that I assume I have to play back. That doesn't work, though. I've played the song according to the colors a dozen times and nothing happens. I also had trouble getting inside the whale because I must have not been in the right position. Is this just another matter of me having to sing the song in the exact right spot or what? Also, the lamps in the whale sing a note when I light them up in sun form, does that have a purpose?