Great, no... Amazing idea, Sinan! I'm seriously looking forward to the continuation of this project.

One remark though: those waterfalls seem pretty massive. In a world that answers to at least a few laws of nature, you'll have to make up an explanation for the replenishment of all that water (influx must equal efflux, if not you'd be faced with dropping/rising water levels, and you don't want that, do you).

As a matter of fact, the width of the waterfalls kinda defines the amount of magic you'll need to explain this away. I can imagine that for a relatively small amount of overflow, the replenishment could be done in the pleasantly unnoticable form of rain and river outflux (the rivers being fed by both rain and magical springs, for example). Massive amounts of water cascading off your floating world would mean a massive influx of water as well, and this would be pretty hard to explain with "normal" phenomena. You'd need huge rainstorms (somewhere on the ocean, preferably), huge upwellings of water in the ocean (resulting in massive maelstroms), etc etc etc.

Another remark about the sun + snow mystery. Like Zach, I too wonder where the sun sets (it rises in the center of the world, you say, but where exactly?). You could use this to create colder regions as well. Say the sun rises and sets at the same central (as yet unknown) location. Places closer to this location would be hotter, places closer to the edge would be colder. Extremities like this northern spike (if North is actually something that has any meaning in a non-rotating world) would indeed be colder in that case.



All in all, a lot of explaining for you to do... But that's the fun part, isn't it?