City goes deeper

The earth is poisoned. The only salvation for the city is to go underground.

Dig, build, mine stone and energy. But be prepared to go deeper at any time.

House: gives people

Electric station: gives energy, requires stone, can be built only on water

Mine: gives stone, requires people and stone, can be built only on stones

Digging requires energy. Different tiles need a different amount of clicks to be dug. You can upgrade your pick.

To go deeper you need first to explore the next layer.

Ground goes down every 20 seconds