Wow, those are some amazing technical hurdles you vaulted over to get the game to run in VR! Unfortunately the VR mode requires tracked controllers, so pretty much an Oculus, Vive, or WindowsMR rig. To use the keyboard, you'll want to actually disconnect the VR stuff. When the game can't find a VR headset, it will fall back to traditional monitor mode with mouse/keyboard.
Definitely not ideal, but maybe better than nothing? Let us know what you think!