Let us show you something that we've been working on for the last several months - Build the City 3D. This app for Windows Phone combines all classic features of a city simulator and 3D graphics.
Do what needs to be done and you'll become the greates mayor this city has ever seen - we're sure about it.
We really think it turned out good and all our hard work will pay off, so here's the link for a free version:
What do you think? We take all the suggestinos on board - there is always room for improvement.