At the moment it will only run on the Oculus Quest. There is nothing really keeping it from working on other 6DOF headsets as well, the Initialization code may need to be tweaked a bit but I don't plan to at the moment.

You could take the source and check the Godot VR tutorial (https://docs.godotengine.org/en/3.1/tutorials/vr/vr_starter_...) to see if you can modify it for your own headset.

And without hand tracking it may be a bit uncomfortable to do push ups. But maybe the knuckles controller will be comfortable enough.