Oculus Quest is required for Android. I am going to experiment with an normal android version but I'm not sure if it will work well. It would require a pretty powerful phone.
There are definitely horror vibes but this is more like a virtual gallery than a game.
There is no plan to make this into a game at the moment but I am planning on adding more interaction to each scene. Maybe some story elements/ world building will be added later but again, no solid plans.