Try the following troubleshooting tips:
  1. Make sure you’ve downloaded the game from the Google Play Store. We can’t verify the safety of versions downloaded from other sites.
  2. Free up device memory by closing running unused background apps. 
  3. Increase storage memory by uninstalling apps you no longer need. Also, try transferring (or removing) videos and pictures from your device. 
  4. Please note, our games run best on devices that meet the following (minimum) specifications:

    - 1 GB of RAM or more (Enter Settings > Storage to check available       GB)
    - Android OS 4.1 or better (Enter Settings > About device > Software Info to verify OS)
There’s now a stack of Android devices out there, some operate very differently than others. Please consult your device manual if additional adjustments are needed.