gistfile1.js

var game;

var create = function() {
  var x = game.width / 2.0 - 64 / 2.0;
  var y = game.height / 2.0 - 64 / 2.0;
  game.add.text(x, y, "ず", {font: "64px arial", fill: "#FFF"});
  // OR
  // game.add.text(x, y, "ぽ", {font: "64px arial", fill: "#FFF"});
}

game = new Phaser.Game(800, 600, Phaser.AUTO, "", {create: create});