I think it would be interesting to be able to travel up the subnet nodes to bigger boards.

eg, with subnet A.B.C.D, being able to visit A.B.C.X, A.B.X.X, and A.X.X.X.

Additionally, subnets are a bit opaque. what does each one correspond to? if you wanted to extend this out even more, It would be nice to have a map showing how big, and where your current subnet is.