It was fun. The fact that zombies are jumping on you no matter what is pretty scary, like the idea that you can use obstacles to kill zombies while they are sitting on you car - really good risk-reward concept.
It's not clear how bullets work, so I think there is a path to clearity improvement.
Music and sound is dope!
3D pixel-art style with monochrome palette is also dope!
Elegant and clever game, it's a pitty that it's not in browser.