How do I finish the lobe?

Hint 1 of 5:

Play Pinball.

Hint 2 of 5:

Shoot the icons in the same order they appear in the maze.

Hint 3 of 5:

Do not shoot any other icons.

Hint 4 of 5:

Don't use the flippers; use the mouse crosshairs.

Hint 5 of 5:

After you have finished the pinball game, a plane will fly through the window
and drop a bomb.