On the Surface of the Moon

Ardan dies trying to leap the crevasse.
How can Ardan move his shell from the precipice?

What's with all of these plants?  How do I get by them?
I can't get back into the capsule; I'm blocked by a green plant.

What can I do on the ledge across from the plateau?
What are all of these symbols I am finding on the walls by the ledges?
How do I use the gold control on the pedestal overlooking the plateau?
How do I get past the alien at the top of the stairs?
How do I open the large gate behind the alien?
There's another door to the left with another gear mechanism!
How do I get past the gate at the back of the courtyard?
The gate locked behind me, and I cannot get back out!
What is beyond the gate at the back of the courtyard?

At the Center of the Plateau
Underneath the Plateau

Up One Level