Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
KotDB: The Earth is almost spherical and its Cartesian map is equivalent to a Froglet playing area - Q.E.D. Even if it is also valid to say Torus instead of Sphere, the spherical aspect is more easily understood by lay people, i.e. non-mathematicians :)