This is a new tutorial from the creators of the Loon Physics tool: "This tutorial shows how to make a simple game using Phaser P2 Physics. P2 Physics will be used to create non-rectangular collision polygons for physics collisions between elements in the game. This is significant because it makes physics collisions look more realistic and appealing."
Loon Physics Tutorial
How to make a game using P2 physics to create non-rectangular collision.