Really enjoyed it. Easily the most success I've had with files/games for a really fun and intense experience!
I did start having a bit of an issue after I came back to it a couple days ago. If I respond to early, the high tick sound doesn't play, even if it does register as a correct answer. I saw you posted an update (presumably for the Firefox audio issue, which I do appreciate there being a fix for if so), so I assume that's when it started.
Encountered it in both Chrome and Firefox. If no one else is able to recreate that issue, it could be a Linux thing (I know the Linux audio stack has it's problems), at which point I can just deal with it. It's nothing major, just a minor thing to get used to.