I think just one of the more recent 2018 versions, I tried on my android phone and I got the same result
I'm trying to make a game to work on mobile devices and PC, but my game does not open on ios, only on Android. But it's strange why yours works!What is the 2018 version you are using?
I think html export versions will work on any platform, and unity UI elements can be interacted with through mobole tough screens
