Default values of class attributes (lives, level) should be mentioned in Description, not just in tests.

A more detailed description on what should happen in case pacman eats ghost at 0 life should be explained (Does he stay on 0 live? Does he reset to 3? Does he go to negative?)

Required names for all class attributes should be also mentioned as precise as possible (no "ball count", but "ball_count"

A note saying something along the lines: "You can implement class Ghost however you want. Constructor in class Ball needs to be able to take 'ball_type' argument, which is a string saying either 'regular', or 'super', or is not present at all (in that case, regular is default)" would be nice