When it's Blue vs Grey, Blue wins every time.
It puts an arrow on the side of the screen pointing in the general direction an artifact is and then points to where it will appear when you complete whatever puzzle sequence you have to do. Same with the parcel detector.
PacMan doesn't chase the ghosts unless he just ate the cherries. How you have it, Pacman is about to die.
It should look like this:
The ghosts chase pacman.