I understand phaser uses Pixi as its rendering engine. What are the main features that phaser adds on top? It seems pixi has a scene graph, and touch support, which is a bit more than some renderers. Phaser seems to add on top various physics engines.... and has a huge API, but if someone could help point out the main diffs that would be appreciated. Phaser also allows you call Pixi directly it seems? http://docs.phaser.io/PIXI.html If there isn't much overhead, it would seem then that there's no reason to just use pixi as phaser will give all the benefits and more? refs: http://www.goodboydigital.com/pixijs/docs/ http://examples.phaser.io/