Hint: Syringes: Syringes are useful to stabilize your heart rate. When
you "free" any ghost, you can go to the android's room
in the main hall (with the moon monument). The android's room
is between the Energy Area and the Work Area. In the desk, behind
the android, you can find a syringe. When you free another ghost,
you can find another syringe. Note: You can see that the freed
ghosts are painted in the room's walls.