Emanuele Feronato has a new tutorial on integrating your Phaser games with Facebook Instant Games: "Facebook Instant Games is a new way for people to play games across Facebook platforms. Powered by HTML5 technology, it allows people to find and play games directly in the News Feed or Messenger conversations, on both desktops and mobile devices.
We are going to see how to integrate Facebook Instant Games API in your Phaser game, and as usual it’s way easier than you may think. The game I am about to integrate into Facebook Instant Games is Risky Steps.
First, you need to create a new Facebook app. If you already published a game on Facebook and want to turn it into a Instant Game, you can’t. You will have to create a new app from scratch."