It looks like that link just calls into our web terminal and has it check out the specified repo into a shell which you then have access to. It didn’t appear to actually create an app, though, so my assumption is that you’re expected to run fly launch from the web terminal and complete the setup yourself.
Hope that helps. Thanks for showing me that we did this.
We are doing some current experimentation around changing the fly launch experience, though, and that might pave the way for something like this in the future.