very cool game, even with difficulty in finding the password, I managed to finish it ^^

the randomness element makes it always harder then when you go by the video. anyway mummy puzzle shows the order of which bandages you should pull which just took me way too long to figure out.

I have done it!
The Frank's Mystery was solved :)

I used integrals, complex variables, analytic geometry and advanced mathematics... it's joke :)

I really solved this puzzle. And I'll give a hint at the end of this commentary.

= My review
This is not a monotonous game. Shuinvy came up with various quests.

And I was pleased with the right attitude to children at the game end :)

Thank to Shuinvy and to Davis Meleod (who help translate the game to the English, his name is written on the end-titres)

= The hint of the The Frank's Mystery
=
=
=
...look only in the FRANK- book, only at numeral.
And mentally do something with it.
(there are all the necessary information for four-digit password)

Others are right. The Frankenstein "puzzle" just ruins the game. Yes there's the book with the numbers, but it's not good enough of a hint. Trying any logical combination of those numbers or even entering the numbers themselves does nothing. In the end, the only way to finish out the game is brute-forcing it -- try out literally every number starting from 0000 on that lock and tediously increase until it finally unlocks.

Maybe it seemed a logical puzzle to the author, but it's not.

@BrolfThePaladin is right, there's no hint on how those numbers on Frank's book help solving the box code.