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

https://lanesniceblog.scriblorax.com/posts/html5-slots-on-ios-and-android-do-they-keep-all-features

Designing a full-sized game for a five-inch screen is all about focusing on what matters most. You can’t just shrink everything down. Instead, prioritize touch-first controls that feel natural on a small display