Thanks for playing it, and for your kindly comments.
I should probably add a tutorial at the begining but briefly:
For basic gameplay:
You should make choises while the background is white by choosing the letters.
And while in the black background select letters which you selected in the white background.
For winning:
I delibaretly didn’t explain the other stuff like letters that appears in the background because they are part of the puzzle.
And there are some easter eggs about with the movie.