Buildings are created in real time, and you have to wire the city for electricity, water, and build roads. Overall, the experience is rather addicting and functions well as bite-size for the iPhone. You build, you destroy, you watch your city grow, and when you're tired, the save button is a mere key away. Sure, the save feature isn't as innovative as say, Rolando's save feature, but it is good enough for when you need to quickly exit the game.
You start off by selecting the type of terrain that you want, as well as how much of that terrain you want occupied with water and land. Once your terrain is set, you can go ahead and start building the city you've always wanted to. Start off by building roads, zones for buildings, electricity and water - how you decide to build these and in what order is completely up to you. Unlike the PC version, the iPhone version allows you to see what it is that you're going to build before you actually build it, this allows you to increase, decrease, or move the desired building until you've got it perfectly in the position you want.