This was a sample game created for a high-school web development class (shout-out to CodeNation!) The class goal was to add multi-player games to a game-hub using React and Firebase. The game hub set up most of the infrastructure around handling users and sessions. The repo with the students' games is here: https://github.com/jtessler/studio-multiplayer-game.
Originally this was multi-player Pong (see here), but I pulled out the Firebase components and made it a single-player standalone game because I liked it.