Upon arriving, take the Necklace of Dreams fragment that is to the right side or 3 o'clock of the screen hidden between some fungi.
Push the pillar to the end of the lower path. Climb up and get on the crack and push the left-most pillar towards the door. Then push the middle pillar down the edge. go over to the last pillar on this upper area and pull it down towards the other two pillars. You will now have a clear shot at the door. Pull the switch and head over to the next area.
Grab the spear and kill the middle of the set of snakes closest to you. Then kill the snake close to the crack. Grab the spear and from this view, a pot can be seen in the far background on a cliff side. This pot contains a topaz.
Now equipped with the spear and stand on the crack. Throw the spear at the snake that is just beside the door. Now pull the switch , kill the snake and you have a clear shot to the next area.
Grab the topaz from the pot sitting behind the gray platform, on a cliff side.
Climb up the wall and you and a pot that contains a topaz will appear in the foreground to the left of the screen.
Grab a torch and don't scare the snakes yet. Sneak up around them and step on the orange pressure plate. It will kill one snake. Scare the remaining snake onto the gray platform to give access to the door. Pull the switch and run for the door.