Have you ever tried to compile it for Gear VR for fun? I know she only has a controller that wouldn’t work for the game, but I would be interested to know if it works in terms of performance.
The game seems to be using low poly and many of the Gear VR apps have good graphic. Wall e. g. has even multiplayer and it works great on my Gear VR.
Samsung Galaxy S8 + Gear VR 2017 Edition + Gear VR Controller