Changes

The player in Pac-Man controls a character of the same name through a maze filled with little dots. But, the player isn't the only one traversing the maze. There are four enemy ghosts bent on killing the catching Pac-Man, resulting in a loss of one life. The player's goal is to clear the little dots by eating them, completing the level and sending the player to the next level, all while avoiding those pesky ghosts.  But, Pac-Man has a trick up his sleeves for the ghosts. There are four larger, flashing dots called "energizers" of "power pellets." When Pac-Man eats an energizer or power pellet, he turns the table on enemy ghouls allowing him, for a limited amount of time, to eat the ghosts. The player knows when the enemies become vulnerable because they change color to blue and wander in a more daze-like fashion. When the energy from a power pellet begins to wear off, the ghosts start flashing from blue to white quickly, letting the player know that he/she will soon become vulnerable again to the crafty menaces.