Not sure if this is intentional, but
Encoded spoiler (Vigenere with key = key)
umjvmlq xfo hybo kovareld eln wmexfovl qyybh byiq xsr vir iss qir dlcsv nbsmpw
super cool game though! Very hard, but also clever riddles!
Another related note (Not gameplay related but something I noticed when getting ending 4) sj wyy avmau sl zimzpc kjrov ispjsre ozcbcmxi gx xfo wmexf mssbx gd hmowl’d gfkreo xfo gmxxcxx yxh qdmjv wyiw “wyyp pijvsu zvgcslovq kvc sr urmro eln xfovc’c ejcs y wipmlyxx”
Also I think the zvgcslov fsrrc are so well done especially in retrospect :D