After been killed by zombies on test map (temporarily renamed from c3a8 to c0a0), automatic load game worked, but manual doesn't.
Continued the blue tunnels area and connected with orange tunnels. Added text format rough map to part 2.
Added some maps to yellow tunnel and connected with orange tunnel system.
Minor changes, bug fixes.
Added maps. Last day of 2 week vacation so progress is slightly slowed down from now on.