Reminds me of an unfinished game I did long time ago: https://www.youtube.com/watch?v=aTtX8CavRTk It also had a 3D mode. Unfortunately it was too difficult to understand what was going on and most play testers were just confused, instead of having fun. :)

That looks really cool, though confusing even though I do understand Hilbert curves. I’m having a very difficult time intuiting the strategy for a game like this. I think the core concept is very interesting though.