Designing a full-sized game for a five-inch screen means focusing on...

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 means focusing on priorities, not just shrinking everything down. You put touch controls front and center for easy play. You choose portrait or landscape based on what feels natural