✅ The app can be updated on the Google Play Store in the following way:

1) Open the Google Play Store app

2) Tap Menu  >My apps & games

3) Find the Magic Jigsaw Puzzles app and press Update

https://support.google.com/googleplay/answer/113412?hl=en

✅ In order to update the app on the Amazon Store:

1) Open the Amazon Store

2) Tap Menu  in the top left corner of the screen > App Updates

3) Find the Magic Jigsaw Puzzles app and press Update