Do not move down the cliff as fast as possible. Instead, move carefully. Your climber rocks back and forth by himself, repeatedly pushing him away from the cliff. To get past hazards, descend when you are at the apex of a push. When you need to enter a crevice, make sure you are closest to the cliff face as you descend. Do not panic when lava follows you down the cliff. The screen will shake when the lava gets close, leaving a few seconds for you to move.