I really enjoyed this! Was this loosely inspired by the puzzle book Letter Coins?
rot 13:
Gurer jrer n srj guvatf gung V sbhaq nzovthbhf (znlor vagragvbany) V fnl guvf abg nf pevgvpvfz ohg jnagrq gb funer zl gubhtug cebprff bs ubj V nccebnpurq vg.
Gur fvyire qnfurq bhgyvarf ba zvffvat pbvaf pbhyq or vagrecergrq nf fhttrfgvat n fvyire pbva tbrf urer, vafgrnq bs nal pbyberq pbva.
Ba cntr 7, gur abgr npghnyyl znqr zr zber pbashfrq, nf “Nal pbva pbhyq tb urer” pbhyq or vagrecergrq nf “nal pbva pbhyq tb urer naq fgvyy fngvfsl gur ehyrf” zrnavat gur pbva lbh cynpr urer qbrfa’g znggre.