I'm not usually a fan of top-down shooter games, but I've played a few in my time. This one needed some instructions inside the game on which buttons to use and could have used a starting screen instead of starting you on the map, but overall it was a decent play. There's just something cathartic about taking out a bunch of zombs and giving the player a melee option was a nice addition since it meant that you weren't screwed once the bullets stopped flying.
I would have liked more stages and maybe a bit more strategic gameplay - perhaps extra items like barricades that the zombies can break over time or bombs that can hit a group for smaller damage, smoke grenades that mess with their senses so they lose track of you... that kind of thing.
Overall it was a fun little game, just needs some polish and extra content to make it more interesting.