Neat idea. What is the controller latency like when using a mobile phone?

The platform uses WebRTC for connections so in the best case scenario (direct peer-to-peer connection): somewhere between 2-10ms. When direct connection is not available, 20-100ms. In really bad network conditions with VPN's in use: 100-300ms. Though usually the latency is not really visible in the games even if there would be larger latency with some players :)