Thanks, bigjus! Yeah, I'm aware of the Firefox issues - I posted about it in the devlog. Unfortunately, there's not really a good fix for this atm because of the way Godot and itch.io handle certain aspects of web builds and playing, etc. As near as I can tell any Chromium-based browsers run it with almost not hiccups at all. To mitigate this as much as possible though I am working on a downloadable version in case Firefox users would prefer that to playing it in another browser, etc.
Again, thanks for playing and posting!
-bit