Hey greetings !
First of all lets discuss about the compatibility,
Since oculus and Pico only supports their own OS, so standalone is only possible for them,
HTC rift is not a device, and Oculus does not comes with a foot tracker,
Now lets discuss about the app,
the reference Video shown is a very easy to make realtime application on Oculus quest 2 ,
My experienced Lies in making Real-time Interior rendering application for Quest 2 and mobile platform,
So graphically its not a very demanding game, computationally also its not a big deal since The projectile motion can be easliy calculated if it does not need Magnus effect, center of gravity offset and any thing that deviates from a normal sphere motion,
now for foot tracking , In quest 2 , I would be using a makeshift arrangement to connect right controller to leg and make the app logic according to that.
You can contact me for a quick prototype, I will share the APK for no charge.
Regards!