Double tap the home button, you'll see a dock at the bottom appear, scroll and find the "App Store" press and hold on the icon until you see the red minus sign, tap the minus sign to close the app and try it again.
Mine shows the updates available but when I click update all the icon does the little circle thing then just goes back yo Update. iPad 2 but my iPhone 5C works fine. Sooooo frustrating when my games have bugs and can't get the updates to fix them!!!