Most of the time, the newest areas in Dr. Panda Town are exclusive to subscribers who get to play these areas first. These areas will normally be available for in-app purchase after some time (1-2 months).
Subscribers enjoy all areas for one low price, including immediate access into new areas and other exclusive features. With an in-app purchase you get to pay once and play in the area forever.
Reach out to us at email@example.com if you have any further questions.