A mobile browser game can feel just like a native app when it supports portrait...

https://wiki-book.win/index.php/How_Much_Testing_Do_I_Need_for_a_Browser_Game_on_Mid-Range_Phones%3F

A mobile browser game can feel just like a native app when it supports portrait mode, loads quickly using caching, and offers touch-friendly controls. These features make the game easy to play right away without delays or awkward gestures