To update your game, go to the Google Play Store, enter the “Updates” section, and then update The Sandbox Evolution by tapping on it. 

If a message "Package File Invalid" pops up,  please follow these steps:
  1. Go to your Device's Settings menu.  
  2. Then, go to  Applications   (may also be labeled "Application Manager").   
  3. Tap over to "All Applications", then Open the Google Play Store app.   
  4. Tap on  "Clear Data"  and  "Clear Cache"
  5. Relaunch Google Play and install or update our game again.