Just solved - that was a cute little game!
(rot13) V tbg fghpx sbe n juvyr orpnhfr V qvqa'g npghnyyl qb nalguvat gung jbhyq yrg zr frr gur "fgngr punatr" nsgre gung jnf npgvingrq. V jvfu gurer unq orra fbzr fbeg bs vaqvpngbe bs gung punatr. (Znlor gung'f whfg qhr gb zr abg orvat rkcrevraprq rabhtu jvgu grkg nqiragherf gb unir gung vafgvapg, gubhtu.)
Nyfb, vf gurer nal cnegvphyne ernfba gung gur jnyyf qvqa'g cebivqr vasbezngvba? Jrer gurer whfg ab bgure natyrf gb nccebnpu vg sebz?