strange Android permission ??

Hi,

I'm new on this game Top Eleven and now I play with my FB account on my computer. But, I wanted to install the top eleven application on my smartphone but I saw there is a strange permission. Can you explain me why the application want to have the permission to read/send/modify my PERSONNAL sms ? I don't really understand why, it's just a game ... there is no link between this app and my sms ? So if you can tell me the raisons, it will be nice :)

so thank you for your answer
mrex