Some questions about the world:
1) Is there no gravity in the spaces between spheres?
1a) If there is gravity between the spheres, does that mean gravity on the spheres always points towards the ocean (instead of the centre of the sphere), or would it slowly transition from towards centre to towards ocean as you got further away?
2) Is there breathable air in the spaces between sphere? AKA does each sphere have it's own atmosphere, or is the atmosphere a kind of universal constant.
2a) If it is a universal constant, is there universal wind?
3) Do the spheres move at all?