Hello @chriz and welcome to our community. I am sorry your game is running so slowly that it is difficult to play. There can be several reasons why the game may run slow. One can be your internet connection. The game needs a strong and steady connection in order to run smoothly. Another reason may be storage space. If you have very little free space available - that can slow the game down. To make enough room for the the game app, there
are two options: delete files from device or move the files to SD card. You can
remove some useless apps, old photos, videos and songs to free up space. Or
move unnecessary apps to SD card. You also mentioned you are using windows 7. You may want to consider upgrading to Windows 10, since Microsoft will no longer support Windows 7 starting next year.