Taking it offline and development stopped
I have decided to take the download of OpenSaberVR offline. Also the GitHub repository will be switched to a private one. This project page will stay online as a reference that there was this project.
If you want to try OpenSaberVR, just search the internet or have a look at the many GitHub repository forks which are available. You will find a way to play it. There are also some forks which have made more progress so far and also support Oculus Quest, try one of these.
With that said, I wish all the other projects or forks all the best!