I really like the style of graphics, I hope to see more projects from you. Is there a gallery in the game, if not, will it be implemented?
The particular pedestal is the white one, standing alone at the end of a bunch of narrow ledges that talks about "voices" and "the main menu." You've got to exhaust the 4 or so lines of dialogue from it which after you should be able to see a new extras section in the game's main menu.
At that point you can just close and relaunch the game and it should be there.