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

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 smart choices, not just making things smaller. You focus on touch-first controls that feel natural on a small display. You decide if portrait or landscape works better for your game