Yeah I made a chain earlier too.
It really depends on how SC loads it, how would it use the text file? I don't know of a feature for this... However if they were separate files you could possibly add levels to a completed game or edit the existing ones which would ROCK.
But then you, Matt, would have to program SC to read it and draw all the shapes, and I can tell already that would be a pain so what do you think?
Oh yeah and that's a cool start screen.