This game contains several hidden messages in the memory, both in the game code ($1000, $1D80, $4000) and in the intros code (second intro: $1008, third intro: $1F00). They are mostly old personal messages which no longer apply and are not listed due to the author's request.
There's a hidden message in the first intro at $1F00: --------HELLO TOMARCO POLO , MWT , TOXYC , THE ELDER !!!--------