theres a type error in the first intro slide. "...but little did he know what about to happen would change the everything." --there should be a "was" after "what".
unfortunately, for me, by the 5th day i already had the laser cannon, flamethrower, turret, rocket launcher and a few others... so it got boring just doing the same thing over and over.
but i'm not trying to be rude because it was a really good game and the reason i got the guns was because i bought over kill and kept clicking the exit button to kill zombies on the same level.
On a scale of 1-10 I would give it a 6.