Updates

No Zombies Allowed Updates
1.6.0 11/19/2012
 * iPhone 5 and iPod 5th Generation screen-size support
 * New Zombies! Battle Nimble Runner zombies and Explosive Nuclear Zombies.
 * Boss Fight! Face off against Jackknife, the mutated boss of the zombie army!
 * New modes! Gun-down pursuing hordes while surfing on a moving vehicle.
 * Earn huge rewards from Boss Fights and choose which supply run modes you want to play.

1.5.2 10/6/2012
 * Bug Fixes

1.5.1 9/15/2012
 * Bug Fixes

1.5.0 - 9/7/2012
 * Character Costumes ! Now you can dress up your Survivors !
 * Nightmare Mode! Can you beat the terrifying new supply run difficulty level?
 * New Weapons ! Time to blast zombies with a barrage of new weapons.

Not mentioned in update notes

Looks like they snuck in a few more decorations also

1.4.0 - 8/24/2012
 * Now you can customize your town with decorations
 * General bug fixes

1.3.0 - 8/10/2012
 * Introducing the new RECYCLING HERO and PERSONALITY HEROES!
 * New PREMIUM business and houses ! They're bigger, better and makes your post apocalyptic town look AWESOME!
 * Find all this great new content in the "SPECIAL" menu when you expand!

Not mentioned in update notes

Hero cooldowns for existing heroes were adjusted as follows
 * Special Agent cooldowns are 8, 12 and 24 hours.
 * Builder cooldowns are 12, 24 and 36 hours.
 * Mercenary cooldowns are 6, 12 and 18 hours.

1.2.0 - 7/13/2012
 * HEROES ! Build their unique, animated hero bases in your town through the "special" menu and use them in the zombie apocalypse!
 * New Businesses ! Can you build the secret 'stache?
 * A solid shotgun blast to some bugs!
 * Notification icons now stack (yay!)

7/2/2012 - 4th of July exploding zombies spectacular!
 * More bomb zombies
 * Higher flying rewards for the next few days

1.1.3 - 6/29/2012
 * Fixed some crash bugs
 * Fixed a graphical issue for iPad users

1.1.1 - 6/18/2012
 * This update fixed the bug that was causing notifications to not disappear after clicking on them.

6/14/2012
 * No Zombies Allowed Worldwide Launch (previously the game was released for about a month in Canada only)