Just built the project for Android and iOS
Android: latest SDK, minimum target Lollipop 5.0, hardware Nexus 5X on 7.1.2
iOS: 11.0 beta, iPhone 5 SE
Unity: 5.6.1p1 OS-X
In the editor preview the sample scene works as specified.
On both Android and iOS the screen is stuck (no compass of gyroscope response). When I limit display to landscape mode the cube is visible, in auto-rotate portrait/landscape only the separator bar with the blue dot is visible. After autorotating from portrait to landscape the display is distorted (aspect ration). App always opens in portrait when enabled.
The menu can be openened (on Android) but not dismissed AFAICT.
Love the editor preview, looking forward to next release!