12,000 BC anyone?

After watching the world generation video. I was googling floating island images. When it hit me. 12,000 BC from Chrono Trigger would make a great Oort world concept.

For those of you who did not play the game. It was a world that was a snowy hell on the surface with people struggling to survive in mud caves, and wood houses. While high above elegant palaces topped the floating island paradise that were inhabited by magically gifted people, and you could travel between the two using special portals that would teleport you.

So the world would have lush floating islands with floating lakes in them, and trees, but down below where you first warp into the world it would be a bitter snowy hell, with a constant blizzard. Below are images to help illustrate.