This mobile browser game feels like a native app because it supports portrait...

https://astro-wiki.win/index.php/What_Are_the_Biggest_Mistakes_When_Porting_a_Desktop_Browser_Game_to_Mobile%3F

This mobile browser game feels like a native app because it supports portrait mode, making it easy to play with one hand. It loads quickly thanks to smart caching, so you don’t wait around