You'll start out by the three walls near the giant bowl of water. Follow the path to one of Captain Rose's goons. It will be laying on the ground next to a fang. Ring the bell and it will turn into a Goon Totem. Pick up the totem and put it in the stand that is closest to where you found the goon. You will then be able to use the goon to get to the ledges that is above him. However, you don't need to go there quite yet. There are a couple things you need to get done first.
If you go to the left, there are three pots, another stand, and a bridge. Ignore the stand, break the pots, and go across the bridge. As soon as you're on the other side, you'll see a centipede right in front of you. Ring your bell to get the Centi-saw. Leave the saw there for now and continue to go left.
You will see another one of Rose's goons. Ring your bell again and get the other Goon Totem. Take the new totem (Totem B) and go back to where the you found the first totem (Totem A). Put Totem B in the stand that is located on the wooden the area. Now you'll focus on the fangs.
You need to find the fang that has a triangle on the bottom. The fangs are hidden in pots all over the level. Once you have the right one, you don't have to pay attention to any of the other fangs. Go back to where you got the Centi-saw. You should see stairs leading down. Go down the stairs, and you will see another staircase, this one leading up. Once you are at the top of the red staircase, go straight over to the large fang that has a flat top. Put the fang with the triangle bottom there. The door will open and lava will fill the pit.
Now that that's done, go find the Centi-saw. Climb on top of Totem A and saw down the wooden pole. Walk across it and then saw down the one on the other side. Don't go back to the other side yet. First, you need to saw down the pole that is keeping the orange and red ball in place.