Sustain a Complex
Using the sandbox mode, choose Ecology which still requires balancing the resources.
Build a complex that is at least 10 levels high and none of the buildings are broken.
Upload a picture of the tower below.

Using the sandbox mode, choose Ecology which still requires balancing the resources.
Build a complex that is at least 10 levels high and none of the buildings are broken.
Upload a picture of the tower below.