Designing a full-sized game for a five-inch screen is about making smart...

https://shed-wiki.win/index.php/How_to_Explain_Responsive_Design_to_a_Non-Designer_Using_Game_Examples

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