Hi!
This was a very good concept, but it was, very frankly, painful to move around. I personally don't like 3d softwares because of the same reason, it's hard to move around in a 3d space when your mouse can only move in 2 directions. It took me like 30 minutes to be able move around without getting stuck.
But overall, it can be a good prototype for something bigger, maybe a multiplayer game where 3 players are moving each sphere individually with keyboard controls.