Designing a full-sized game for a five-inch screen is about smart choices, not...

https://simonsnewchat.rivetgarden.com/posts/how-do-you-design-for-both-tablets-and-phones-without-breaking-ui

Designing a full-sized game for a five-inch screen is about smart choices, not just shrinking everything. You focus on touch-first controls that feel natural in small spaces. Portrait mode often works better than landscape on phones