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

https://titussexcellentnews.nexorafield.com/posts/why-desktop-game-ui-can-t-just-be-scaled-down-to-mobile

Designing a full-sized game for a five-inch screen is all about setting priorities instead of just shrinking everything down. You focus on touch-first controls that feel natural and easy to use