[Glen] is tackling this with a port of Pac Man to the Radio Shack Colour ... Overall, the port is highly faithful to the original, with the game code being identical at the CPU level.
In the original Pac-Man (released in October 1980 as an arcade game in Japan), the red ghost Blinky was written to follow behind Pac-Man, Pinky is tasked with getting in front of Pac-Man ...