I thought this was a really good game. It helps that it has zombies in it. I love how they seem to becoming more popular than vampires these days. Then again, this was made back in 2007. I still love what you've done with this. The graphics are good and the gameplay works so well.
It's the kind of game that's just really addictive. Luckily, I have more things to do today. It really does take a lot of hits to shoot one zombie down. Of course, that's what upgrades are for! It's fun to see them just stammer after being shot.