Ok. In the spirit of the jam then, I'll probably need to either:
1 - Wait out the jam review period before updating with the rest of the levels.
Or
2 - Upload a second "full game" version, and just update the description of the first one with something along the lines of "this is the jam entry version, if you want to play the full game go view this page instead".
I'm nowhere near a release date for the other levels (I really don't want to rush them). So this might all be a moot point for me if the jam review period passes before my levels are ready. But hopefully this thread helps some others out too. :)