Indie game storeFree gamesFun gamesHorror games
Game developmentAssetsComics
SalesBundles
Jobs

How can I make it have more levels in depth?

I don't quite understand the question. What do you mean with depth?

I am pretty sure he is talking about height.

I am wondering hows I can make it have more city deeper down

Download source code, open Game map in Unity, select Map and change «‎Map height»‎ value, then click Build.