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

https://josuesbestword.quillnesty.com/posts/what-does-responsive-web-design-actually-change-in-a-game-ui

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