A mobile browser game can feel just like a native app by supporting portrait...

https://ericksexcellentblog.image-perth.org/how-do-i-make-an-html5-game-feel-like-a-native-app-on-iphone

A mobile browser game can feel just like a native app by supporting portrait mode for easy one-handed play, using caching to load quickly even on slower connections, and offering touch-friendly controls that respond smoothly