The second level requires you to climb up to the platform with the pink tree. In order to do that, you will need to "re-remember" where the rocks were located.
All you need to do is turn away from the rocks and they may randomly shift to another position or disappear entirely. Patiently climb as high as you can and spin around until you can progress. If you reach a dead end, you may need to drop a little and try to climb from another angle.
Here is a full video walkthrough for those who are interested!
This particular section begins at 0:55