The "(C) 1983" date looks to be faked. Mobygames says Ms. Pac-man on the C64 was published by AtariSoft in 1984.

The company only formed June 1983, and their first ads from Dec 1983 make no mention of Ms.Pacman. with the first being in April 1984, AtariSoft, the third-party software publishing division of Atari, announced conversions of seven hit arcade titles for the Commodore 64 and VIC-20. The games are ...Ms. Pac-Man,