The starting cinematic has a great ambiance! I like the music you chose for it. The asset selection was pretty good too, as well as the scene building.
The gameplay itself is a bit too frustrating; especially when few of the people are infected the "randomly choose a target" always feels to never chose a zombie, which makes going from few zombies to a lot of zombies almost a given. It's also not great when the target is behind a tree, for example, or when the camera stays way too little time on a target, or way too much on one.
I liked the slow-mo effects! And visually the animations, run speeds, and so on look very good; it's easy to spot a zombie from a human, and it all looks like cameras from a zombie movie, with people fleeing from zombies. Great job!