object.create.js

var Game = {
  init: init,
  draw: draw
}

function init(name){
  this.name = name;
}

function draw() {
  console.log('draw');
}

var Ball = Object.create(Game)
Ball.update = update;
Ball.init = init;

function update() {
  console.log('ballz');
  this.draw()
}

function init(size){
  Game.init.call(this, 'ball')
  console.log('size', size);
  console.log('name', this.name);
}

var ball = Object.create(Ball)
ball.init('big');