Im sorry the game didnt work for you. Maybe you need to activate hardware acceleration for your browser. The game is definetly not optimized and the backend is just stuck together with ductape. Thats probably the source of the issue.
Unfortunetly I also cant replicate the issue on my side. Normally I use chrome, but even when trying with firefox my game works. The audio stutters a bit inbetween the loading screens, which is not present on chrome, but except from that, I didnt find any issues, when trying on my machine.
Thank you for enduring the probably longest browser game loading screens of your life while trying to play it anyways.