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

https://www.bookmarking-planet.win/designing-a-full-sized-game-for-a-five-inch-screen-is-all-about-focusing-on-1

Designing a full-sized game for a five-inch screen is all about setting priorities, not just shrinking everything down. It means making touch-first controls that feel natural on a small display and choosing portrait or landscape to suit the gameplay