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

https://www.bust-bookmark.win/designing-a-full-sized-game-for-a-five-inch-screen-is-all-about-making-smart

Designing a full-sized game for a five-inch screen means focusing on priorities instead of just shrinking everything down. It’s about making touch-first controls easy and natural in portrait or landscape mode