This is not a game (sorry). I got the ideas illustrated in the project from: - Alex Bellos's excellent mathematical colouring book "Visions of Numberland" (specifically, the one about triangulated hexagons modelling dynamical systems); and, - http://www.cut-the-knot.org/Curriculum/Games/Romb3dPuzzle.shtml Credit (as usual) to @DadofMrLog for the triangle-filler.
