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

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 all about prioritizing what matters most. Instead of just shrinking everything, you focus on touch-friendly controls that feel natural on small screens