Flawless.
Haven't played a flash game this addictive since... well, never! Although I find that once you get the 2nd shotty, it becomes easier, and spamming survivors at the start makes for quicker kills. But once you get the Baretta, just aim for the legs. Kill up to 5 zombies (my personal record XD) in a single shot! Might wanna downgrade that a tiny bit. But other than that, it is, indeed, flawless.
Graphics: Damn good. 10
Style: Damn unique. 10
Sound: Great, but not annoying. 10
Violence: Zombies, guts, gore, guns. 10
Interactivity: Menus, movement, aiming. 10
Humor: It's got zombies, and the diary is damn funny. 10
Overall: Damn good. 10. I'm waiting for the sequel, buddeh!
-Fishy