I get thats its a free app but seriously? What is the point of having an app, free or not, that you cant save any of your work? If, for whatever reason, you decide to download this app anyways, heres a little advise...scale down your work with two fingers and screen shot it. Then open with Photoshop or some other app that will let you crop it. Loophole found.
*<{mandapanda}>* about Doodle Booth