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

https://dibz.me/blog/how-do-aspect-ratios-affect-game-ui-on-phones-1269

Designing a full-sized game for a five-inch screen means focusing on priorities, not just shrinking everything down. You start with touch-first controls that feel natural on a small display. Then you decide portrait or landscape works best for your game