Online casino design evolved as smartphones became the main way people play....

https://wiki-velo.win/index.php/Why_Do_Casino_Sites_Use_Horizontal_Carousels_Like_Streaming_Apps%3F

Online casino design evolved as smartphones became the main way people play. Developers prioritize mobile-first user experiences to fit quick gaming sessions on the go. They make game catalogues easy to browse with simple taps and clear categories