Time for action – creating our game scene

The GameScene class is already added to the start project and some of the code is already in place. We'll focus first on building the game's interface and listening to touches:

1. Let's work on the addTouchEvents method:

   function GameScene:addTouchEvents()
       local bg = cc.Sprite:create("background.jpg")
       bg:setPosition(self.middle.x, self.middle.y)
       self:addChild(bg)
      
       local function onTouchBegan(touch, event)
           self.gridController:onTouchDown(touch:getLocation())
           return true
       end
   
       local function onTouchMoved(touch, event)
           self.gridController:onTouchMove(touch:getLocation())
       end
   
       local function onTouchEnded(touch, event)
           self.gridController:onTouchUp(touch:getLocation())
       end
   
       local listener = cc.EventListenerTouchOneByOne:create()
          listener:registerScriptHandler (onTouchBegan,cc.Handler.EVENT_TOUCH_BEGAN )
      listener:registerScriptHandler (onTouchMoved...