Not to keep harping on problems (seriously, I love this game) . . . but when I go from one side of the world to the next (or around the centre of a geode, etc.) I get motion-sick from the swoopy-zoomy switch. Not just a little, either -- dizzy and nauseous to a degree that forces me to avoid gravity-switching zones.
I don't know how this could be addressed while keeping the gravity mechanics intact, really. It might not be possible. I just thought I'd bring it up in case there is a way.