Elevator Action
 
 
 Hint:
 If you've got a man in black on the floor below as 
 you come down in the elevator, jump towards him when 
 you're about halfway down to his floor. You'll jump 
 straight up against the floor above and then move 
 forward into the bad guy as you come down, either 
 killing him or giving you enough time to duck and shoot. 
 Shoot all the time, especially when you get at the 
 hard levels. When you are waiting for an elevator, 
 shoot constantly in the opposite direction. That way, 
 you will instantly hit an eventual enemy (instead of 
 figuring out how to deal with him AND the guys arriving 
 with the elevator).
  
 At the end of each level, if you get two red doors at 
 opposite sides of the building, go down to the basement 
 and teleport yourself back, instead of jumping back and 
 forth.