This is a great game! it's a new excelent form to see the undead path, but I found some "mistakes", the achievements are saved with the account of newgrounds, but the progress on the game are lost if you erase cache or some other archives of the navigator, would be a HUGE improvement if the progess was save just like the achievements, with the account of the page, also the posibility of save in more of one slot helps to explore some others paths, and open an unlimited posibilities in terms of achievements, and this can only understand when you contemplate the history in the game, what happen if you show to the military an army of zombies? and that it's just one example, for the rest this is the best game of zombies that I found in the net, thanks for the experience and the entretainment! =D