A very fun game, which is actually a collection of several casual  games, where players compete to gain points and trade for prizes.

There is a lot of complexity envolved in it's features, from creating a collection of synchronized leaderboards, to communicating with a custom made server application on an AWS server and managing users and games on a seamless manner.

Other features are multi platform in-app purchases, social network sharing, backend data management and much more.

For more info, please check http://battleoftheleaderboards.com/