Play Ms. Pac-man!!

Ms. Pac-Man is a popular arcade game released by Midway in 1981. This sequel to Pac-Man differs from its predecessor on the fact that it has different screens and a female character. It was also one of the more successful of early arcade games as its sales record is still unmatched.

The gameplay of Ms. Pac-Man is largely identical to that of Pac-Man, with a few differences.

• Ms. Pac-Man moves about the maze significantly faster than the original Pac-Man.
• There are now four different mazes, with different colors and "filled-in" walls (compared with the original Pac-Man's hollow walls). Each maze has two pairs of "warp tunnels" connecting the right and left sides of the maze (except for the third maze which only has one set of tunnels). The maze is changed after each of the first three intermissions.
• The ghosts have pseudo-random movement, which precludes the use of patterns to beat each board.
• The two "fruits" on each level now enter through one of the warp tunnels, wander around the maze for a while making a "thump-thump" noise, then (if not eaten) eventually leave through a warp tunnel.
• Clyde is replaced by another orange ghost named Sue, who was later turned purple in Pac-Land to differentiate her from Clyde.
  
  Like Pac-Man, Ms. Pac-Man suffers from a bug in the fruit-drawing routine, which renders the 256th board unplayable. While it may be possible to reach the 256th board using the "rack test" cheat available as a DIP switch (usable through MAME or other arcade emulator), the actual arcade hardware will crash at or around the 134th board. At this point in the game, the data tables used to determine the maze and ghost behavior for a particular level are exhausted and invalid data is loaded. A corrupt value loaded into the pointer to the maze data causes the screen to turn black. Though the ghosts and Ms. Pac-Man are still visible, the game becomes unplayable. In essence, once you have completed the 133rd stage, you have beaten the game.
  
  Credit: Wikipedia Free Encyclopedia