But uh, the big place? Like, with a staircase, a skeleto and some big curtain things? You need to climb up that wall with the curtains, and from there it's not too hard to find your way out.
I'm pretty sure you can use the lever to turn the throne into a lift. To be honest, I'm not 100% sure what you are talking about.
You can, but you don't have to. You don't even need the levitating throne. There's a back staircase behind the secret door at the left of the staircase as you look up at the throne.
ZOMG multiple paths in the first dungeon! Revolutionary!
I love it. This sort of stuff is everywhere, too. Well, most of it looks just like that (climb, fly, find the lever/skull/teleportingfountain, or find the other longer path), but it's nice.