This level also uses a new move known as wall jumping and wall scrambling. 

To WALL SCRAMBLE (Wall Jump Upwards): 
1. Jump to a wall until Lara hugs the wall 
2. Holding the jump button, press up to scramble up 

to BACKWARDS WALL JUMP:
Lara hugs the wall 
2. Jump to a wall and perform a BACKWARDS WALL JUMP 

And Then a WALL SCRAMBLE: 
1. Jump to a wall and perform a BACKWARDS WALL JUMP 
2 When Lara hugs the next wall, perform a WALL SCRAMBLE 

Lara will wall jump as long as you hold the jump button and
Lara hugs the wall. You will know it when you see it