a free, Complete OpenSource project Game-Kit clone of FlappyBird with Unity3D
This game is working on Android, iOS, PC, MacOS.
Compile and Run Requirement: Unity3D v4.6.1f1 or above
How to run: Open up the Unity3D and then open this project, Select FlappyUFO > Scenes > Startup scene and press Play Button.
Easy to setup and play, all codes are commented well so you can learn it easily.
Tested on: Unity3D 2018.01.0f2
Tested on: Unity3D 5