Reactor

While in "attract mode" you can move your ship around. After the game ends, if you move your ship to the top of the screen and get as close to the top corner as you can, your ship will bump some sort of invisible thing and you will get points. 
                                                top wall
                                        ------------------------
the * represents the "magic corner"    /                       *\
By bumping into this "magic corner" after the game is over, you can earn enough points to get a free guy and continue the game where you left off. It's ok if you hit the wall while you are trying to do this, but it may slow your progress down a bit.
1