Running out of ways to cause havoc
I love the series itself, but this entry seems to show one significant problem. Your running low on different ways to kill people. The gunplay is getting tired, and the hand to hand has been reduced to choking and neck snappin', a good dose of good ole fashioned fisticuffs would add more flavor. Giving sword was a good way to add more variety, but you're going to need fancier moves to keep it entertaining.
The graphics are very clean, being simple yet vary effective in visual impact and style itself. Changing the zombies was a good touch.
The sound was great as usual.
The problem with the violence as I've already stated is that it's getting stale, theres only so many times you can put a nightstick through a man an still keep it enjoyable.
The main problem with the humour is that it relies almost completely on the ending, and a little bit on the violence, having more amusing deaths would make for better violence and humour.
I rate this as the worst madness yet, still very respectable, but lets hope it picks up.