Thank you for reaching out to the Samsung community! We apologies for the inconvenience, it may happen that the game is consuming more RAM and causing performance issue. Kindly go to settings>>device maintenance>>memory>>clean now. Kindly disable the power saving mode if enable.
Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
