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

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 smart priorities—not just shrinking everything. It means creating touch-first controls that feel natural on small displays. You decide when portrait mode fits better than landscape