Try this. I have the Galaxy S7 too. It worked for me.
Make sure your Google Play Store app is up to date. It should be version 8.3.73 or later.
In Settings -> Display -> Screen Resolution, make sure you are running at FHD+ or WQHD+ resolution (not HD+ resolution).
In Settings -> Apps -> Google Play Store -> Storage, tap Clear Data. Only clearing the cache is not enough.
Reboot the device before retrying the game
Make sure your Google Play Store app is up to date. It should be version 8.3.73 or later.
In Settings -> Display -> Screen Resolution, make sure you are running at FHD+ or WQHD+ resolution (not HD+ resolution).
In Settings -> Apps -> Google Play Store -> Storage, tap Clear Data. Only clearing the cache is not enough.
Reboot the device before retrying the game
