The symbol was GMC now it is Game?
Yes, the shorthandle changed from GMC to GAME, but as nothing changed about their addresses, that shouldn't influence your whitdrawal in any way.
I tried a few exchanges and the address I get from them are invalid on Crypto-Games.
We're aware of a small problem and currently are working on fixing it. Your withdrawal (if pending) will be sent out soon.
After that, everything should be working as it used to again.