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

https://zulu-wiki.win/index.php/Responsive_Breakpoints_for_Games:_Should_I_Target_Specific_Phones%3F

Designing a full-sized game for a five-inch screen is all about prioritizing what matters most. Instead of just shrinking everything, you focus on touch-first controls that feel natural in hands. Portrait mode often works better than landscape here