dude, please use angle (wikipedia -> sinus, cosinus) for the car, not just left, right, down, up, its horrible!
And why do you release a demo? Are you afraid you won't complete it?
Ending 1: The visitor get unconscious because of electricity, but after that he kills the last person.
Ending 2: The visitor just gets in and kills him, and then flies trough the window.
Ending 3: Kill the visitor with the gun.