It's a neat little novelty track, but it doesn't really do anything for me. The message has definitely been done before, and I've seen similar poems (not raps, however) that have an inverted message when read backwards in the same way.
I'll say 4/10, just for the fact that I wouldn't get anything more out of this from listening to it again. Still cool though, just not impressive in an artistic sense to me.
4,5/10 I did not like the vocalist at all. It's like he wants to sound raw but he still sounds like a standard poppy vocalist that is not distinctive at all.
9/10 ! I like twenty one pilots, especially holding onto you.
Youtube thing not uploading, here's the link: http://www.youtube.com/watch?v=bpOSxM0rNPM
Arctic Monkeys, Alt Rock!