You are immediately greeted by a rather obvious trap involving the yellow pressure plate. So hang on the wall and go past it by going to its side. Continue on and you will find another yellow pressure plate. Step on this one to drop the boulder. Move back once then continue on your way to let the boulder drop down. Climb down the wall and stand in front of the door. To your left is a pot containing a sapphire. It is hidden under a stone sculpture. If you can't seem to get it now, you may get it after exiting this door down below.
Grab the spear but do not throw it at the lizard. Let it chase you and have it press the pressure plate in turn dropping a boulder on it. Move towards the climbing opening on the wall. The lizard will spot you but again, do not throw the spear at it. Grab the sapphire from the very well-hidden pot just above the yellow boulder.
go up the wall and take the route under the boulder to have the lizard follow you. Climb onto the yellow pressure plate to have it drop on the lizard. Go in front of the orange push block and throw the spear at the snake. Before entering the door, grab another Frozen Spider fragment from the pot sitting by the water. Go to the next area.
Make your way and take the path furthest from the lizard and show yourself. It will begin chasing you. Now go counter-clockwise and make your way around the lizard. Drop down the wall twice onto the crack. Now go down and up again to deliberately crack the wall to drop down. You won't make it if you just climb down. Now here you see three boulders and they will all travel along the path. After pressing the orange pressure plate, there is a pot containing a sapphire in the bottom right corner of the screen.
Continue along the path until you come to the corner. Going straight will get you squished by the boulder on top. So move back once and then continue on your way to the next area.