OK, my first snippet was over-contrived, all you actually need is game.plugins.add({ render: function () { var game = this.game; var debug = game.debug; debug.text('Scale: ' + game.scale.width + ' x ' + game.scale.height, 16, 224, 'yellow', debug.font); debug.pointer(game.input.activePointer); } });  Try adding  <meta name="viewport" content="initial-scale=1">