At first, I thought it might be too easy. It was truly anything but. It was fun to be able to shoot the actual ammo that was coming towards you. Without that, the game would have been unbeatable. It is a bit unique for a defense game. I still would most likely not recommend it. It could have more detail.
I guess it isn't that bad when it's easy to understand. That's kind of a double edged sword. While I like things that are easier to understand, that also shows that there's not too much effort put into it. The sounds weren't bad. Yes, I was reminded of 911.