To manually update the game on an Android device, please follow the steps below:

1. Open Google Play.
2. At the top right, tap the profile icon.
3. Tap "Manage apps & device." Apps with an update available are labeled "Update available." You can also search for a specific app.
4. Tap "Update."

For additional details and troubleshooting please check the following Google Play FAQ article:
https://support.google.com/googleplay/answer/113412?hl=en