Saturnade by Sebastian Mihai is a Sega Saturn homebrew game inspired by a popular game featuring an avian flapping its wings to pass through the opening between vertical pipes. In Saturnade, the concept is reversed a bit, in that the player controls the opening, rather than the ship.

If the opening gets too close to the bottom of the screen, it will “snap” back and reappear at the top. This is so that the game is not trivialized by waiting for the opening to “land” at the bottom, and then work it upwards from there.