I'm not sure what my problem is, but I didn't have any sound, and after about 10 minutes of play the game crashed (there was just a blurry Drillbit logo).
I'm using Vivaldi (a chromium browser).
Oh no! I am sorry to hear you are having issues. I wrote the game in a little custom c#, but it's using Unity for the Web GL build, so it is likely just an issue with Unity. I'll see if I can't take a look tonight though. Curious!!