A mobile browser game can feel native by supporting portrait mode, so you play...

https://foxtrot-wiki.win/index.php/What_Should_I_Prioritize_First_to_Make_My_Mobile_Web_Game_Feel_Native%3F

A mobile browser game can feel native by supporting portrait mode, so you play comfortably on your phone. It loads quickly thanks to caching, minimizing wait times. The controls are designed for touch screens, making the game easy to navigate