Make sure to read the newspaper in the attic.
Im sure the only reason why nobody has reviewed the game yet is because they are too busy grinding out levels and getting new gear. Really fun game!
In the later stages of the game the crowds of zombies overwhelm the graphics and the screen just bobbs back and forth. I was doing good but I died because I couldn't aim any longer. Needs work.
Takes a few lucky guesses, but in the end strikes just the right balance between entertaining/challenging.