Level 9 Walkthrough: by Mystery Man

To actually get inside, place a bomb in the middle of the left-hand rock.

From the entrance, go North, then go North again.  Bomb to the West, and go through.
Kill the Lanmola, then push the left stone and go through the tunnel.  When you emerge,
go through the locked door to the East.  Ignore the Wizzrobes, and bomb South.  Kill
the enemies here to get bombs, otherwise, bomb South.  Kill the Wizzrobes, grab the
Compass, then go North, North, then East.  Ignore the Patra and go South.  Kill the Gel
to get five rupies, then bomb and go East.  Kill this Patra to get the Map, then bomb
to the North, and go through.  Ignore the enemies, and again, bomb North.  Kill these
enemies, then push the left-hand stone to get the Red Ring!  From the room with the
stone, go South twice, then West, then North.  Kill the Patra to get some bombs,
otherwise, go through the locked, North door.  A Wise Man is here, but what he says is
really stupid, so just bomb West and go in.  Kill the Wizzrobes, push the left-hand
stone, and go down the stairs.  Kill the Zol and go through the locked door to the West.
Kill the Keese to get another five rupies, and go West again.  Kill the Patra, and push
the left-hand stone and go down the stairs.  Ignore the Wizzrobes, and bomb North, then
go in.  Kill these Wizzrobes, then push the middle stone and go down the staircase to get
the Silver Arrows!  Go back up the stairs, then go South.  Kill the Wizzrobes, move the
left-hand stone, and go back through the tunnel.  When you emerge go North three times,
ignore the enemies, and bomb to the left, then go through.  Run into the room, because
there are traps at the door way.  Kill the enemies, then push the left-hand stone to
open a stair case and go through it.  When you come back up, ignore the enemies, then bomb
and go through the West.  Kill the enemies, push the left-hand stone, and go down the stair
case.  Kill the Patra, then go up to fight, the final Boss, Ganon!

Now the rest is up to you, and I will not spoil it!  Hope you had fun!