There are rounds / waves of zombies that come to you.
if they dick in you come close. they will fall down and they go dead. but. there will also be some of your health bar go down. if the health bar is completely red (first orange) will light entering the redstonelamp and it's game over!
there will come a new version of this minigame (V1.0.0) ( | 2 Februari 2013)
there are few buttons in the control room.
you have the start button, the start button allows you to determine your wave's to start or stop. and you have the reset button for the health bar. that makes the health bar orange (instead of red).