Sim Metro Tycoon Play around with awesomely accurate simulations of greedy car drivers as they try to drive from home to work. Place roads, homes and workplaces to make a smoothly flowing traffic network or a giant traffic jam. It's what we do now. Also inadvertently learn about how the A* search algorithm works.
Jam year: 
MS Windows, Mac OS X, Linux / Unix, Web browser with special plugins or packaged apps
Tools and Technologies: 
Unity (any product)
Source files: