Go through the left door and kill the enemy. Go through the top door.
Open the chest for a Map, get the key, backtrack and open the door.
One of these pots has a full magic refill, if you need it. Go down the stairs.
Bomb the wall in front of you to collect 50 rupees and the compass. Bomb the left wall for 100 rupees. Go back to the stair room and take the top-left door.
Bomb the wall for 100 rupees. Light the torches to open the door and go left.
Open the chest for a key, bomb the wall for 100 rupees, bomb the wall for 100 rupees. Return to the key room. Because the button-covering thing is lost, you will have to walk around the door.
Bomb the wall for 100 rupees. Light the torches for 200 rupees! Return to the previous room. Open the chest and use its key. Go into the next room, light the torches for a Boss Key. Go up the stairs.
Go to the bottom-right of this area and up the steps. Bomb the right-hand wall for a sweet 415 rupees!!! Open the chest to get the Glove. Now you can lift as many light-coloured rocks as you wish.
OPTIONAL: from Big Chest room, go down the metal steps, then down the spiral staircase to the previous floor. Here, go down, left, down, right, unlock the door and go up the stairs. Bomb the wall, talk to the thief and get +10 bombs!
If you did this find your way back to the previously-mentioned room. Otherwise, just go through the right door.
Open the topmost chest (go way, way up) for the L-3 sword! Open the other chest, get the key, and use it. Open the chest, get the key, and use it.
Light the torches and go through the door.
Unfortunately the next bit is lost to us, so you have no choice but to cheat. Stand in roughly the centre of the room and walk left. When the screen scrolls, keep going. Now keep walking until the door is directly above you. You can restore your health or items from the pots, and then go up into the boss room. After a few slashes, it's all over. Collect the tablet, and you're done!