I've deliberately stayed away from trying this game out, saying "If I want to roll a dice and pretend to fight I'll go play an RPG" but finally decided to give it a go today. Got to about level to and wanted to smash my head into the desk if I missed a slow moving zombie one more time. Then something strange happened, I decided to close the window and found that my hand couldn't move the mouse, fifteen minutes later and I was still playing, twenty minutes after that. Bloody addictive!
It's pretty much A okay as it is but if I had to give my opinion I'd say reduce the amount of times you miss an attack, I was playing a dexterity character and at a high level I didn't miss very often but at the start there were quite a few misses, it's a little unbelievable against groups of zombies that wouldn't be attempting to dodge and can become very frustrating, especially if you end up dying because your character just missed the obese zombie for the 4th time in a row ^^
The NPC part is working wonderfully I actually found them really helpful and you can even put an element of trust into them to finish off a weak enemy while you kill a stronger one, worked very nicely.
All in all, well done Sir. Very entertaining.