When the level begins, you find yourself on the upper level. Here you have to choose between the left and right hand part. The left part takes you directly to the lower level, bypassing the middle one. If you decide to do that, follow the third image.

If you choose the right hand part, you will visit the middle level via a ramp. Then, after following the second image, you can find the opening that leads to the lower part.

Before sliding down the ramp, take a look above to see the boulder. It starts rolling whilst you are halfway on the ramp. To get away from it, slide almost until the bottom of the ramp, but jump before the end. If you jump halfway through the ramp, Lara will kneel on the flat part and the boulder will get her. If you do not jump at all, Lara will stumble when she reaches the flat part (something that she does on every slide) and again the boulder will get her. So, jump just before reaching the end of the ramp and hide into the alcove on the right hand side.

There is another boulder trap on the left hand side. The boulder starts rolling when you step on the square before the slide. So, reach the penult square, turn around to face the way you came from, hop back to trigger the boulder and immediately run and hide into the alcove on the left hand side.

You will also find a movable block in the middle of the level. Push\ pull it away in order to reach the pick-ups. Then make your way to the pit that takes you to the lower level.

There is nothing important to do here, apart from killing a cobra. Find the way that leads to the cobra cave.