I just finished my physical multiplayer version of Pong! You control the bat via GPS - by running in the real world. It has single-player but also online real-time two-player mode, so you can grab some beers and play in the park with friends on a sunny day And it's free. Please give me your feedback!
Some notes on the development:
The C2 native geolocation-plugin works with Intel XDK along with the "org.apache.cordova.geolocation"-plugin.