Although you've probably beaten the game by now, When you get to
Gannondorf keep your hoverboots on!!! Walk to a platform, NOT the
center one a side one. Then when he shoots the fireball thingy at you,
hit it back at him like Phantom Gannon in the forest Temple. Keep
doing this and sooner or later it'll hit him,( or you) then you can
shoot him with a light arrow. when he drops down, hover over to him
and beat that sucker with your master sword. Keep doing this until you
finally kill him, then get out of the castle. ( follow Zelda.) then
outside of the castle Ganondorf will come back in the shape of a giant
Lizard. Then your master sword will be gone, but just hit his tail
with your Giant's knife. When he's dead a really cool story sequence
will follow. That's how I beat the game.