help, my Flash cs6 Android app is too big for Google play!

this is a FUN kid's learning app about dinosaurs. I built it with Flash cs6. I would like to put onto Google Play - it is a Flash app created with cs6.0, just slightly too big (55MB!!) for the GP environment. I need to build out extensions files and need help getting through this process. I think the best solution is break it into a free app and an in-app upgrade to the full app which is in the extension. Who can take my FLA file, advise me on how to create extension files and walk me through posting it onto Google Play? PLEASE only respond if... 1) you have READ this project description entirely 2) REALLY understand this Google Play extension business, have done it before 3) you can deal with Flash cs6.0 4) you can do this TODAY thank you, Fiona