I was recommended the game Slice It, which I decided to buy, but this placed an icon for Game Center on my phone that I don't want. When I press and hold on it I don't get a cross in the top left hand corner to remove it from my phone. It doesn't appear as an icon in the Apps window on iTunes for me to remove. How can I take it off my phone? It's annoying that just because I purchase a game it is assumed I want to link to other people/friends/players. I just want it gone!