If it helps, I'm currently achieving HD graphics by setting up the game with the following game = new Phaser.Game(window.innerWidth * window.devicePixelRatio, window.innerHeight * window.devicePixelRatio, Phaser.AUTO, 'gameContainer');and using game.scale.scaleMode = Phaser.ScaleManager.SHOW_ALL;game.scale.setScreenSize(true);I'm then making my assets double size so my PSD for iPhone 5 screens is 1136 x 640