I liked it !
While the art style is not my personal favorite it was clean and suited the not so dark atmosphere, compared to other zombie entries.
Had some minor issues, e.g. caught 23/22 targets and had even two civilians still around. The targeting/hitzone was a bit wonky and i was surprised that the cilivians remained so calm, after the murmering, shirtless guy tried to bite them.
Theme is hit very nicely, this wouldn't come up in my thoughts until i played your submission.