The alien hieroglyphs that appear during the opening sequence translates to the following text:
Created by McKack.
Start a new game in New Game+ mode and enable the "Flight mode" code when meeting the Hexahedron. You can move as it, but additionally once exiting the screen from successfully completing the view rotation tutorial it provides, you will be taken to another screen with the Black Monolith in first-person. The text, translated, is