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

https://high-wiki.win/index.php/Why_Does_My_HTML5_Game_Audio_Lag_on_Mobile%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