Crawl across the seals, and you will be launched up, but you have to also jump in order to get to the next floor to the east. Immediately, move back and jump up to the floor above the statue, then jump onto the seals. This part is a little complicated, so you’re going to want to read through the whole next line before you try it: Go east until you reach a statue with a skull head and spikes for arms and activate it. You want to go west here, but your path is blocked by the disembodied hand in a tank, so go east instead.
Here's the relevant section of my walkthrough:
You need to unlock the Projection ability at the monolith to the east before you can get past the hand-in-a-tank. Click to expand.Oh, I see where the problem is.
