Levels?

Anyone know how many levels are in this game? It's fun, but, I don't want to spend a credit if I've already gone through half the game in an hour. Thanks for your help.
~~JD

I haven't finished it yet. Just finally finished level 4-5, which was *tough*. How far have you gotten in your demo hour?

edit: Judging by the places in the museum that are slowly being filled with artifacts, there are 12 large levels, each with 2-5 sublevels. I don't think we have to worry about this game being too short.

Thank You lordkalvan...that will make my decision that much easier.
Thanks again,
~~JD

There are 12 levels, each containing 5 episodes. Thus, 60 games, becoming more challenging as you progress. World Adventure was my first time playing a match3 that actually has a purpose, is a great adventure, and can be played over and over again (try to achieve expert on all episodes of each level). If you know of another game like this, please let all us fish know.