cute and simple! a bit easy with the ability to go down to 3 letters. i liked (rot13 for spoilers) gur snpg gung GUHZO unq bayl bar cngu gb vg (punatvat gur ynfg yrggre) - v jvfu gurer jrer zber bs gubfr 'erfgevpgrq'-srryvat jbeqf.
bu nyfb, v jnf fyvtugyl qvfnccbvagrq gung TBNY naq JBEQF (naq PBYBA) qvqa'g qb nalguvat