open-flappy-bird/ ├── OpenFlappyBird/ # Unity project root │ ├── Assets/ │ │ ├── Scripts/ │ │ │ ├── Core/ # Game logic: Bird.cs, Pipe.cs, GameManager.cs │ │ │ ├── UI/ # UI scripts: ScoreUI.cs, ...
It essentially does what Maya/3DS/Blender do when you set xform before export, but without introducing program specific weirdness, changing mat orders, geometry ordering, changing FBX versions, hashes ...