My only problem is that one obnoxiously loud whistling noise. It rises up so far above the normal volume that it makes the ambient noise unbearable to keep on.
Otherwise, no real complaints.
An important problem I can see with this is that you can never skip the animations. I understand they're part of the game, but I've seen my zombie eat a kebab enough to not ever want to see it again. Other than that, the game is great.
There's a bug that froze the game up as soon as I tried to buy upgrades. There is no apparent way to move from the upgrade screen, and I was allowed to keep upgrading until I had negative upgrade points.
Otherwise, it's a decent game.
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 "Lab of the Dead"){kind=icon}
 "Depth Charge: First Attack"){kind=icon}
 "The Torture Game 2"){kind=icon}