Designing a full-sized game for a five-inch screen is about making smart...
https://direct-wiki.win/index.php/What%E2%80%99s_the_Ideal_Spacing_Between_Touch_Buttons_in_Games%3F
Designing a full-sized game for a five-inch screen is about making smart choices, not just shrinking everything. You focus on touch-first controls that feel natural on a small display. Portrait mode often works better than landscape