Sequel to the unique and innovative Exit, Exit 2 is definitely more of an expansion pack to the series.
Well, to be honest, Exit 2 doesn't pack much new content, except a lot of different levels. At that note, it's probably better to be called Exit: The Expansion rather than a suggestive Exit 2.
Basically, that's it. Graphics and music barely made impact, because it's the same, verily. There are no noticeable enhancements, levels play the same (find the victims, find a way to rescue them and then exit.) Of course, the tutorial is a very welcome mode, so newcomers will know what to do and will hopefully stop falling off high ledges or leaving victims behind.
The game is more appropriate for those who have been longing a couple more levels to enhance their Exiting experience, and also to those who have yet to don the black garb of Mr. ESC.
But, in fairness, that new flowing black cloak that Mr. ESC wears has some pretty cool animations...