Defend Your City
Build military installations to be able to defend against enemy bombardments. Increase the range of your defenses so that you can expand without fear of being destroyed by bombardments.
Increasing Bombardments
The attacks will become stronger and stronger, and you will need more reliable defenses if you do not want to lose part of your city.
New Biome: Mountains
Food is hard to come by in a frozen world. Give it a try! Although snow will bring new opportunities for tourism, such as ski slopes.