I was playing the game with my friend, and when we got to Ganon's Castle, we heard the music in the background. My friend was like, "I wonder who's playing the organ," and then I replied by saying, "I bet Ganondorf is." When we got to Ganondorf, he was playing the organ.
Once I found out how to get to the Water Temple, I couldn't stop playing. The Spirit Temple was really fun.
Also, I beat the game! The Wind Waker is no longer the only Zelda game I have beaten. It's very sad though because that means... there's no more in Ocarina of Time... Besides the Master Quest. I got to the Deku Tree place, and it's a lot harder.