Game shouldn't start until connection is established.

Without this connection, the game doesn't work - so it's kinda important.

Use gUM & websockets.

Really just needs the interface.

Sync up events (it should be fine if both on same wifi).

Can use a simple ping/pong with timer to work out the latency and sync up events and remote events based on latency.

There's something wrong when people leave games, or try to jump in to games.

single tap on mobile does weird things

Something to do with uglify + min.js

Currently running with un-minified code in production, but obviously gzipped.

If player leaves game for long enough, when user (disconnects), show connection issue (after X time)

If you win, you should see your own face, not the other player's face.