This is a game of flappy bird that was created for a Unity tutorial here: https://unity3d.com/learn/tutorials/topics/2d-game-creation/project-goals

Here is the information from the Unity Asset Store:

In this beginner-friendly example game and accompanying live training tutorial we will look at creating a simple 2D Flappy Bird style game. We'll cover best practices for infinite or endless games, basic object pooling and creating cartoon physics effects.

This is the complete version of the project provided for your reference.

The incomplete version of the assets referenced in the live training may be downloaded here:
http://bit.ly/flappybirdstyle

Enjoy.