It is very easy to setup AdMob ads, just follow these steps:
Go to Assets – > Google Mobile Ads -> Settings and put your app id (from your AdMob console) there.
Open the script “Menus.cs” and put you interstitial ad id on line 34 for android, line 36 for iOS.
Very minimalistic UI and simple gameplay with one touch controls.
Your only goal is to make it to the top of the level.
The game has 51 levels, try to complete them all.
Compatible for android, iOS, WebGL, PC, linux and many other platforms that Unity supports.