I'm on Windows and I use Brave.
141 days ago (+1)
I’m going to download Brave and test it myself, but a quick google search came up with this. After further digging, specifcally Shields and fingerprinting can cause certain issues with WebGL/HTML5 games. 
If you have access to another browser, like Chrome or Firefox, you could try playing it on there. I would love for you to get a proper experience :)