This is super interesting! It quickly gets chaotic, but that's the point of this sort of gameplay, of course. I think this is extremely promising as a prototype, and I'd love to see it developed further, with more different enemies (and avatars) and perhaps a slightly slower escalation of the difficulty and chaos of it all. There's a lot going on here!
For the record, I encountered the occasional bit of lag, which unfortunately is difficult to avoid with Godot 4 web exports. For the future I'd encourage you to offer downloadable versions as well, as these generally run more smoothly.