Does anyone know where to use the secret key?
Instructions to get it (rot13): pyvpx orybj gur frpbaq nafjre ba dhrfgvba sbhe
also rot13 spoilers for secret stuff
svefg xrl vf orybj gur cebprrq/arirezvaq bcgvbaf
frpbaq xrl vf orybj gur lbhe/lbh ner bcgvbaf
guveq xrl vf ba gur guveq cyngsbezre yriry, whzc bire gur synt naq uht gur jnyy gb lbhe yrsg, gurer'f n uvqqra nypbir jvgu gur xrl va vg
xrlf ner hfrq ng gur raq, ol pyvpxvat haqre gur lrf/ab bcgvbaf jura vg nfxf vs lbh'er onon