why not try reading everything backwards?
Like this:
.yadot lit,rorrim eht eht yats ti dna elpmip ym fo tuo tohs
eciuj elpmip ehT
.sregnif xedni ym htob htiw elpmip ym fo tuo eciuj elpmip eht
ezeeqs I,nehT
.elpmip pit etihw ym fo trap retuo eht reat ot regnif xedni ym
fo lian regnif ym esu I
Hmmm...on second thought, is the double-word at "...stay on the
the mirror..." the joke???