PLEASE READ BEFORE YOU BUY!

Game is fun but I cannot upgrade any units. If I try to upgrade a white box appears on screen and the game freezes. Also if I try to play anywhere else other than SAN Francisco the white box appears and the game freezes. Please fix the App for the 6 bucks I paid for this it should not be glitching this bad. I will change to 5 star as soon as the glitches are fixed

Pietras2014 about 2012 Zombies vs Aliens, v1.1.2