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

https://milosinterestingcolumns.huicopper.com/what-makes-a-mobile-game-interface-feel-invisible-to-users

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