Fridge Magnets is one of the example games provided by Player.IO
It shows how to use the Player.IO multiplayer service to build a game where you can move around shared letters in real-time.
This example showcases how to use the Player.IO Multiplayer service to build a shared space where multiple players can simultaneously modify it.
The source code for this game is distributed in the Player.IO Development Package along with everything else needed to do game development with Player.IO.
The latest version of the Player.IO Development Package can be downloaded from the downloads section: