The next thing I thought of pertaining to the theme was the game Antichamber. The game itself is bizarre (or beautiful) enough, but what is even more outstanding are the developer rooms in the game.  Alexander Bruce rewards players for solving challenging game puzzles by showing some of the creations he made while developing the game. Each of these 'windows' could be considered a virtual gallery of impossible objects, all of which are toys compared to the mechanics the game uses as objectives.