Excellent! But very difficult.
Great game! Good balance between click'n'shoot defence and, what I'll call, resource management. It would have been nice to know that zombies take more damage when shot in the head, as it took me several tries to get past day 2. Even still, I find it to be quite hard, which is not necessarily a bad thing; just slightly too hard for my personal taste.
Keep up the good work, I would love to see more flash from this author.