Adding the first scene in our game

Now it is time to add a menu scene to our game. For this, select the Platformer folder and right-click on this folder, select New File. Select iOS | Source | Swift File and then Next. Inside Save As, give it the name MenuScene, and click on Create.

Click on your MenuScene.swift file. Now it's time to do some code stuff:

import SpriteKit
class MenuScene: SKScene
{
  //#1
  let PlayButton: SKSpriteNode
  let Background: SKSpriteNode
  //#2
  init(size:CGSize, playbutton:String, background:String)
  {
    PlayButton = SKSpriteNode(imageNamed: playbutton)
    Background = SKSpriteNode(imageNamed: background)
    super.init(size:size)
  }
  //#3
  required init?(coder aDecoder: NSCoder)
  {
    fatalError("init(coder:) has not been implemented")
  }
  //#4
  override func didMoveToView(view: SKView)
  {
    addChildToScene();

  }
  //#5
  func addChildToScene()
  {
    PlayButton.zPosition = 1
    Background.zPosition = 0
    Background.size = CGSize(width:self...