VR and physics go together like macaroni and cheese!
The tricky part is going to be judging the game. I'm not personally going to have access to a VR headset during the judging.
If you really want to do VR, please make some videos of the gameplay for the judges. The physics is the focus of this jam, and like I said, physics and VR are a great combination. But we might be unable to properly experience the game if it's in VR.