One of my favorites on Kongregate. It would be nice, as mentioned, if there was hold fire option for cannons. I've attempted to use cannons to flank the enemy on certain levels, but unfortunately, the enemy move out of the cannonballs' way. If I could wait until the enemies had halted before I unleash lead destruction, it would help in certain scenarios.
I love finishing of the last zombie with a jump/headchop with a katana. Reminds me a bit of Link's ultimate kill move in Twilight Princess for some reason. Maybe its the green outfit.
Good game, but it's kinda annoying that all these "trial versions" are creeping into Kongregate. I liked it best 'cause all (or virtually so) the games were whole and free.