Designing a full-sized game for a five-inch screen means focusing on what...

https://wiki-square.win/index.php/How_Do_You_Test_Mobile_Game_UI_for_Thumb_Reach%3F

Designing a full-sized game for a five-inch screen means focusing on what really matters instead of just shrinking everything. It’s about making touch-first controls easy to use and choosing portrait or landscape to fit the gameplay