When you find the girl, and go to the little escelator thing...push down and jump out to the exit from where you came.
And you wil only have the girl there and you gone
To win the game: set stickykeys to turn Ctrl on, then just run through each level, getting as high as possible. Keycard is on the middle platform after the second jump-up column. Just run, don't kill every damned guy and win in about 10 minutes. To beat boss #1 lvl 3, get him on the bottom platform then stand on the one above, stay centered above him and fire down into him. To beat final boss, just stay on bottom with it and unload all your heavy weapons into his head, run back and forth with him. He won't hurt you when you're on the bottom.
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