Good game, No incentive to continue...
Firstly, I would like to say I thought this was a great little time waster and perfect difficulty! [On easy mode I completed the game without any zombies crossing my wire mesh fence, but it was still so fast paced there was a thrill despite this]
There are a few things I think you should change though...
-More of the hand drawn cut scenes
-Bigger incentives to continue! [Like a weapon unlock at 10 000 points to keep people playing.]
-At the end, I expected something new, a boss perhaps, that would have been cool, or at least a change of scenery.
-The survivers are great, but more would be nice, the same goes for the traps, there needs to be more incentives and variety in the game
-It would be nice if you could go back and play certain levels [I wish I had the option of playing the last red dot on the map but I won and would have to start again]
-The survivers should have a life bar rather than instantly die