Designing a full-sized game for a five-inch screen is about making smart...

https://touch-wiki.win/index.php/Why_Do_Mobile_Games_Use_Collapsible_Menus_So_Much%3F

Designing a full-sized game for a five-inch screen is about making smart choices, not just shrinking everything. It means focusing on touch-first controls that feel natural in your hand. You have to decide if portrait or landscape fits the game best