If you have that code click on sprite just copy that code from that sprite and past that interstitial ad code with your play button or any other button you want also on the start of layout add this two code show interstitial ad another one is show banner ad so it will always show ad also you can open Construct 2 tow time from your computer task manager first open that ad template and than open your game so you can easily see the codes and if you really bought that ebook than contact the owner he is very helpful sorry I can't give you any code because I'm not the owner I bought ad template from scirra store