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

https://lanesniceblog.scriblorax.com/posts/mobile-slots-in-browser-vs-app-what-s-the-difference-for-ui

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