On the games side, I am coding a web version of Kuhhandel (a german boardgame) where people play using their smartphones:
https://github.com/AquiGorka/kuhhandel
Here I used webrtc data channels to send a smartphone's gyroscope data to a webapp that renders a virtual puppet. The puppets control bar mimics the smartphone's orientation:
https://github.com/AquiGorka/puppets