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

https://sizedesk.com/what-happens-when-a-full-sized-game-has-to-fit-on-a-five-inch-screen/

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