Mostly maintenance with a few new features
"The 2.0.1 release of Phaser is mostly a maintenance release. With 2.0 being such a significant upgrade there were bound to be some issues, and this release addresses them. One of the core things a lot of you kept telling us was that you need Arcade Physics to work pretty much exactly as it did in the past. So in 2.0.1 we've taken ArcadePhysics back another iteration, fixed a few of the most common complaints you had with it, and fixed every single physics example as well."