This GitHub repo contains a bunch of Phaser games by JoJoee, with all the source code and assets. He keeps adding to them as well, and there are already some great examples: Including a clone of 2048, Angry Birds Space and an ASCII Roguelike.
There are also hundreds of other examples, collected from various places around the web, including Boom Dots, Boids Flocking, Breakout, Bresenham Light routines, and plenty more. All of them are fully attributed, but it's nice to get all the source from one place.