Designing a full-sized game for a five-inch screen is all about prioritizing...
https://online-wiki.win/index.php/How_Do_You_Prioritize_Controls_on_a_Small_Game_Screen%3F
Designing a full-sized game for a five-inch screen is all about prioritizing what matters most. It’s not about shrinking everything down but choosing touch-first controls that make playing easy and fun