Designing a full-sized game for a five-inch screen is about smart choices, not...

https://stateofseo.com/how-do-you-test-mobile-game-ui-for-thumb-reach/

Designing a full-sized game for a five-inch screen is about smart choices, not just making everything smaller. It means focusing on touch-first controls that feel natural on a small display. You decide between portrait or landscape based on what fits best