Open the audiogame.js JavaScript file.

Add the following code in the jQuery ready function:

$(audiogame.melody).bind('ended', onMelodyEnded);

Add the following event handler function at the end of the file:

  // show game over scene on melody ended.
  function onMelodyEnded() {
    console.log('song ended');
    alert ('success percent: ' + audiogame.totalSuccessCount / audiogame.totalDotsCount * 100 + '%');
  }
})(jQuery);

It is time to save all files and play the game in a web browser. When the game is over, we should see a pop-up alert with the successful rate.