Changes in this update
New: flexible mine sizes – 32 m, 26 m and 20 m.
Smaller mines use less space on the map, but cost more IC.
Mine Optimization Center becomes more important: level 0–7 = 32 m, level 8–14 = 26 m + 32 m, level 15 = 20 m + 26 m + 32 m.
Existing mines keep their size and are displayed correctly.