To enter the game, the game reminds the play store to update, but the play store only uninstall and open the option,
If you can no longer see the update option on Google Play, then it may be that your device has been blacklisted as being too low spec to run the game properly. If you were playing the game fine on your device prior to the update, please contact Rovio customer support at support@rovio.com - they can respond to enquiries in Finnish, English, Dutch, German, Italian, Russian, Spanish, French, Turkish, Japanese, Korean and Chinese.