It’s not working – Playground AR: Physics Sandbox Review

I have the tablet iOS 12 and when I try to get in the app it go’s grey says move around and I do but it does not work so a restart my tablet as it says still not working. I know this I a vary good game I saw it and played it at the apple store. So if u know how to fix this I would love to know. Thank you for reading this dev.???
Review by unicornbou on Playground AR: Physics Sandbox.