Congo (Second Visit)

How do I open the outer wooden door?
How do I get inside the inner, stone door?
How do I get George and Nico through the room of spikes?

How do I get George across the floor of tiles?
How can I get George across the chasm?
How can I get George across the balanced slab of rock?

George is in a room with four huge machines -- what do I do?
I don't know what to do in the room with all of the crystals on stands.
How can I find an exit from the crystal room?
How do I open the door with the lightning symbol?
How do I get George and Nico out safely?

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