This is a complete Unity game, called FireFall.
It is ready for release, and it’s excellent for learning purposes.
Contains Admob and Unity Ads
How to play?
On mobile : Hold and move your finger left-right on the screen to aim.
On desktop/web : Use ’A-D’ keys on your keyboard to aim. Press ’Space’ to shoot.
Your goal is to destroy as many of the obstacles as you can.
However, if an obstacle passes the top of the level, then the game is over.
Background music by Eric Matyas: http://www.soundimage.org
Sound effects: https://www.noiseforfun.com