Okay the Dailogue box should be customisable atleast the opacity because on Android it takes up half the screen and it also doesn't hide
And you can't see anything behind the box
For this game and others, I recommend downloading PC version and emulate with JoyPlay, then you can hide the dialogue box just by swiping up. It works for almost every game out there.
You can do that with this game by default. Swipe up on your phone to hide the interface, swipe down to bring it back.
You can hide the whole thing by swiping up on your phone and swipe down to bring it back