Does the game have to be modelled around the air plane seat and tray? I interpret the jam as making vr games that is seated experience and limited hand movement (so that it is playable in such a cramped space).
I would LOVE to make a game like that. That takes the strengths and immersion of vr without having to physically jump around like a maniac. There's far too few of those!
Also... I've heard people trying to play VR games on airplanes drifting a lot in the headset as the accelerometer registers when the plane turns, but I have not tried it myself.