HALF OF THE FEATURES DONT WORK

i bought this on the 22 of october 2016, FOR 10$ way to expensive and half the festures dont Work, whenever u want to go back to main menu, there is a white screen that pops up and you cant do anything after and also you cant even upgrade ur characters,because of the white screen that pops up, and i have an iphone 7

TheMemeMaster64 about 2012 Zombies vs Aliens, v1.1.2