Nice one!
First game ever one newgrounds that i played to the very end, and ive tried a few! Liked the graphics, and the play style, though, some more days / weapons could be added.. A flamethrower would be awesome! See how a group zombies gets consumed by the flames.. IF your planning on making a sequel (wich i indeed hope you will) could you make some new areas? Like.. First day you are here.. Next day you have gone to there and so forth..
All my fives R belong to this.. Keep it up! ^^