Interesting idea! I like it.
However like some others I also experience the problem that when I mistype one thing, or after one person uses my mouth, I can no longer type words, nothing registers.
I also agree that the font is hard to read.
It also seems the characters that walk by get stuck just outside the screen where I can still see the first letter orso of their word at times, they seem to not despawn and therefore no new visitors spawn.
EDIT
played the web version in itch and it did not have the same issues (other than the font being a bit hard to read, but doable).
So it seems to be a download version only problem for me at least!