I'm sorry you had this issue!
Honestly I don't know much about programming (which is why I made the game in RPG Maker lol) so I'm not really sure how to help. ;-;
The browser version tends to be pretty buggy, so I always recommend people download the windows version if they can. When I tried the web version on my phone on Chrome it worked mostly fine (aside from the long loading times and delayed sound effects), so I'd suggest trying a different browser.
I hope you can get the issue fixed!