I was playing on future map for like 5-10 mins when my game stopped
Additionally, to what RECHARGED_RAY said, you can resolve this issue by reading some articles here: http://help.tankionline.com/lists/7-knowledge-base/?category=234.
It could be your computer or your internet that made your game stop. There are no hacks for such issue due to anti cheat system. And could be that some one logged in your account from different place while you were playing.
Please, explain your problem in detail.
You can read this article if you have lag http://help.tankionline.com/topics/2361-how-to-reduce-lags/ Read this also to change your password if someone tried to enter your account http://help.tankionline.com/topics/2352-how-to-change-my-password-email-address/
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