It is ready for release, and it’s excellent for learning purposes.
You can try out the game:
How to play?
On mobile : Tap the screen to rotate the obstacles.
On desktop/web : Click on the screen to rotate the obstacles.
Your goal is to hit the obstacle which has the same color as yours.
However, if you hit a obstacle which has different color, then you die.
Unity 2018.2.13 or higher
Documentation contains everything.