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

https://delta-wiki.win/index.php/How_Many_Controls_Is_Too_Many_on_a_Five-Inch_Screen%3F

Designing a full-sized game for a five-inch screen is all about prioritizing what really matters. Instead of just shrinking everything down, you focus on touch-first controls that feel natural on small screens