Q:
Stuck in the first chamber
A:
run into each one of the lightning things. one will teleport you to the other side of the vines. the other two will hurt you.
Ahh, thank you! I ran into those randomly for 5 minutes, but never the right one.
If you watch a white critter spider run into one of the portals that will tell you which one is the correct one to advance. The other two down you. So pause a moment to watch the little beastie skitter!