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

https://wiki-room.win/index.php/Is_it_Better_to_Build_One_Shared_Code_Base_for_Desktop_and_Mobile_Games%3F

A mobile browser game can feel just like a native app by supporting portrait mode for easy one-handed play, loading quickly thanks to smart caching, and offering touch-friendly controls that respond smoothly