yeah it becomes harder once you want to apply it to a curved surface, though you can still do a lot of watery stuff on a sphere, just not in the same way like you do it on a flat surface

I tired to do something like this on Distance Galaxy, however the particles form too perfect a sphere for the GSsphere, so the effect isn't as good.

yes, would be awesome to see "animated water" in more maps :)

Clever idea, I think I'll try to replicate this in my next level!