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

https://remote-wiki.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 by supporting portrait mode, so it fits your screen comfortably. It loads quickly thanks to smart caching, letting you jump right in without waiting