If the new update is not available to you after the game redirects you to the Google Play Store, worry not. Just follow these instructions and you should be able to update:

1. Close the game entirely.
2. Open the Google Play Store app.
3. At the top right, tap the profile icon > Tap “Manage apps & device.”
4. Under “Updates Available,” tap “See details.”
5. You should see the "Update" button next to the Stranger Things: Puzzle Tales app.

If the update is still not showing for you, then it's because the update is on its way to the Play Store in your region. Once Google has pushed the update to your Play Store then you will be able to download and install it. Sometimes this process can take a couple of hours.