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

https://wiki-global.win/index.php/Best_Practices_for_Mobile_Game_HUD_Without_Blocking_Gameplay

Designing a full-sized game for a five-inch screen is all about focusing on what really matters. You can’t just shrink everything down—instead, prioritize touch-first controls that feel natural on small displays