My device is the huawei y9s (android)
Sadly i am greeted by a loading that seems odd, and then just a black screen. 
The loading screen on Android does usually look small like this, but the black screen is certainly an error. I encountered this on a few phones I tested it on myself, and I'm afraid there's not much that can be done about it, since it's a limitation of the engine. 😔 Sorry!
Same problem with the Android app. Less than two week old, fully updated Samsung S7 tablet so might be too advanced for the game engine. Looking forward to playing this when I get my PC fixed.