Thanks for reporting it. I'll sort it out soon.
However. I didn't changed anything in the built version since december. The February update is just a blog post, letting you know what I'm working on right now.
More levels will come eventually, but your current problem comes from different source.
Levels are not hidden. Please test some other game, perhaps your phone performance dropped during this time? (I mean you might installed an app that consumes a lot of resource?)