phaser_new_mobile_or_desktop game.js

var game;

window.onload = function() {
    var isMobile = navigator.userAgent.indexOf("Mobile");
    if (isMobile == -1) {
        game = new Phaser.Game(480, 640, Phaser.AUTO, "ph_game");
    } else {
        game = new Phaser.Game(window.innerWidth, window.innerHeight, Phaser.AUTO, "ph_game");
    }
    game.state.add("StateMain", StateMain);
    game.state.start("StateMain");
}