I have a slight issue. It's been happening with all of the webgl/browser games on these entries, so it's probably just me. But the camera pulls to the right constantly, the player character spinning perpetually with no user input applied. No controller or anything either. I even tried to unplug my keyboard to see if anything changed, but the problem persisted and I can't aim at anything with any degree of accuracy.
It seems like it's no big deal and may only be me, but I thought I'd bring it to your attention in case you wanted to try to recreate the bug somehow.