Designing a full-sized game for a five-inch screen is all about setting...

https://tango-wiki.win/index.php/How_Do_Aspect_Ratios_Affect_Game_UI_on_Phones%3F

Designing a full-sized game for a five-inch screen is all about setting priorities, not just shrinking everything down. It means making touch-first controls that feel natural on a small display and choosing portrait or landscape to suit the gameplay