When playing the game, do you have any other apps running in the background, or do you close all other apps before playing?
We have found that restarting the device or closing all other apps before you start the game can prevent freezing issues due to lack of memory.
※Article: How to Close Apps on Android
We recommend that you have at least 2GB of free space on your device for optimal experience.
※Article: How to check your mobile RAM
(*Memory, called RAM, is not the same as storage space. Some people think that there are 9GB and 18GB of storage space, but the smartphone does not have 9GB of RAM so far.
Unless your device is the latest smartphone, most of the storage space is between 1GB and 3GB.)