Above the gameLevel1() function, create a new function called startGame():

function startGame()

Add in the following lines to instantiate the physics for the paddle and ball:

  physics.addBody(paddle, "static", {density = 1, friction = 0, bounce = 0})
  physics.addBody(ball, "dynamic", {density = 1, friction = 0, bounce = 0})

Create an event listener that uses the background display object to remove the "tap" event for startGame(). Close the function with end:

  background:removeEventListener("tap", startGame)
end

In the addGameScreen() function that we created in the previous chapter, we have to add the following line after the call to the gameLevel1() function. This starts the actual game when the background is touched:

  background...