Shooter Arena was built to show what's possible with GraphQL and Unity. To be specific, it was built to show the various features Hasura's powerful GraphQL engine can enable in a Unity game. Asides from showing what's possible, it was also created to show Unity developers how to give their games similar features.
It took about 2 months to build.
The sheer competitiveness of the gameplay. It's an FPS without the extra distracting things like selecting weapons, terrain and all of that. Just the players, their speed and their accuracy.
Yes. There are plans to release it on PC, Oculus Go, Oculus Quest, HTC Vive.