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

https://trentonsexcellentthoughtss.evergrovio.com/posts/how-to-design-a-spin-button-for-one-handed-play

Designing a full-sized game for a five-inch screen is all about prioritizing what really matters. Instead of just shrinking everything down, you focus on touch-first controls that feel natural on small screens