Designing a full-sized game for a five-inch screen is all about smart...
https://sergiossplendidcolumn.timeforchangecounselling.com/pixel-density-and-ui-sizing-why-my-buttons-look-tiny
Designing a full-sized game for a five-inch screen is all about smart priorities, not just shrinking everything down. You focus on touch-first controls that feel natural in small spaces. Choosing portrait or landscape mode depends on the game’s needs