This is a complete Unity game, called Money Shooter.
It is ready for release, and it’s excellent for learning purposes.
Contains Admob ads.
The game has 4 levels, however, it’s really easy to add new levels.
WebGL Demo
Android Demo Apk
How to play?
Move your finger right-left on the screen while holding it down to control the player.
Your goal is to get as much money as possible by increasing your number.