What's going on here? I have never played this game before.

Perhaps this is a marketing model of game merchants, whose purpose is to let you click on links to play games, or it may be a trick of scammers. In this case, if you haven't played games, then you don't have to pay attention to this message. At the same time, you can also call your mobile phone operator to see if your mobile phone is charged. If it has not been charged, you can ignore this message normally or report this situation to the mobile phone operator. You can also intercept such short messages directly through the interception function of the mobile phone, and you won't receive similar short messages in the future.