Ashley - Aah I see now. Sorry for the confusion - silly error on my part.
For anyone who's getting the black screen thing:
Make sure you highlight and zip the contents inside the exported C2 folder (i.e. /images and the .js etc), not the exported C2 folder itself.
@Ludei - apologies for my confusion. The error console inside your launcher is a great feature for most needs, although I'd imagine a list would come in handy for many developers. Great stuff so far. Keep up the good work.