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

https://www.tool-bookmarks.win/a-mobile-browser-game-can-feel-just-like-a-native-app-because-it-supports-1

A mobile browser game can feel just like a native app by supporting portrait mode so you can play comfortably with one hand. Fast loading and caching make it ready to play quickly, even on slower connections