There are 2 rooms with ganon in them. 1 has the whistle, the other has the crystal. To get the crystal, make sure you are pushing the blocks the right way. I would imagine that you are in the right room ms_zelda_lady, you just need to push the blocks up and down on the corect sides. I'll give you this one. up on the right, down on the left. There is other that is similar that you will run into down the road. It's a different pattern. You'll have to get that on your own. :) :)

Boommaster: Remember the room with the chest in the middle you couldn't get to. Find a way to it.