Can't purchase puzzles?

If you have problems purchasing puzzles since upgrading to iOS7 it could be your iTunes Apple-ID.
Please try the following steps:

1. Go to your iPad Settings app, and Select the "iTunes and App Store" option on the left.
2. Tap your Apple-ID to sign out of the App Store.
3. Now reboot your iPad as described here:

http://support.sparkleapps.com/knowledgebase/articles/199583-how-to-restart-your-ipad

4. After it re-starts, go back in to Settings, and sign in to the App Store again.
5. Now go back to the app, and try your purchase again.

Your purchases should now work correctly.

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