Designing a full-sized game for a five-inch screen means making smart choices...

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

Designing a full-sized game for a five-inch screen means making smart choices about what matters most. Instead of just shrinking everything, you focus on touch-first controls that feel natural on a small screen