If you're able to get to the Microsoft offices in New York on May 16th then you can attend this free course: "Learn the basics of Phaser.io a JavaScript & HTML5 framework for creating browser based webgl & canvas games by walking through how to make your own playable platformer. Learn about sprite animation, version control, and continuous integration to help make your development process easier."
Intro to Phaser Course
A free class: Intro to browser based game dev in Phaser, held at the Microsoft New York office.