I like the concept
I like the idea of creating a review system simulation as a method of training the NG user base to rate reviews accurately. It helps give a stronger grasp as to what's abusive, useless and helpful. This really should have been created years ago by the NG staff team for that purpose; because to be fully honest, a description merely explains it in theory; but it does not explain it literal interaction and for this reason could potentially lead to misconceptions.
I would critique the graphics, what with them simply being screen shots of the actual website, but then it became apparent to me that you created this in just under a day. So I can't really blame you for formatting it like that, although updating the graphics from pixels to vectors now that the challenge is over wouldn't hurt.
I foresee this submission reaching a somewhat critical high in popularity in the near future, just given the concept alone. I really can't believe no one has done this before, of if they have, just that it was so unpopular that it wen't unnoticed before is still unbelievable.