pushed 3 for rifle at the screen where It said "rifle unlocked" and it seemed to lock up the game (made continue, etc, unclickable) and gave the message "rifle is not unlocked"
very nice zombie defense game with a great upgrade system...though becareful, weapon upgrades could be skipped if you research next weapon before maxing your current
 "Zombie Night"){kind=icon}
 "My \"Dear\" Boss"){kind=icon}
 "Island Escape demo"){kind=icon}
 "Fortress Guardian 2"){kind=icon}
 "GUNROX: Zombietown"){kind=icon}
Game updated...Thank You