In this room use a bomb plant to blow open the doorway and go in that room.  Throw the bomb plant just inside that room at the three statues and one will come alive and chase you.  Throw a Deku nut at it to stun it and then slash it with your sword.  Then run away because it will try to chase you down and then blow up.  Now retrieve the compass from the treasure box and leave the room.  In this room, take the bomb plant that's next to the door you just went through and place it right in between the two rows of bomb plants.  If you place it right when it blows every bomb plant should go off.  This will lower the stairway leading to the second floor.  Go up the stairway and around to the doorway and through it.  In this room three of the statues come alive and chase you, and the fourth has to be moved.  You don't have to fight the three statues if you're careful not to touch them in any way.  Just move the statue that's in front of the ladder out of the way and go up the ladder to hit the switch to open the door.

Now you'll once again be back in the big room but this time on a bridge at the top of it.  Go across the bride to the other side, jumping over the hole in the middle.  Now you'll end up in the moving
spikes room.  Make your way to the opposite side where you'll find a gray block in front of a ladder.  Use the block to get on top of the platform containing a treasure chest and a bomb plant.  Use the bomb plant to blow open the door at the top of the ladder.  You'll need to time it right.  Wait until the bomb blinks rapidly before throwing it across to the doorway.  Once you've done that go through the doorway.  Now use your slingshot to shoot the gold eye on the wall past the pillar of fire and the fire will disappear.  Jump across and go through the corridor to reach the upper lava room with two more lizardmen.  Kill the lizard men and go through the newly opened door.  Shoot the gold eye on the wall opposite you to get rid of the first flame, then jump to where it was and turn left to see another gold eye.  Shoot it to get rid of the second flame.  Then jump across.

In the next room, which is the moving spikes room again, jump straight across the gap and then get the treasure box to your right which contains (Hurray!!) bombs.  If you wish you can jump down and bomb a doorway to your left to reach a room with two bush guys that sell you crap.  I wouldn't recommend it though 'cause it's a hassle to get back up.  Move on down the passageway and step on the switch.  This switch enables a moving pillar which gives you an alternate way to get to the second floor.  Now go right and find the bridge.  On the other side is a bombable wall with some rupees in it if you want to get it.  In any case, drop a bomb down each of the holes in the bride to blow up the two eyes of the old dead Dodonogo.  Once both eyes have been blown up it's mouth will open.  Use the pillar to get down and enter it's open mouth.