Actually there
was an A.I. on the ghosts. Blinky (red ghost) always had not only the fastest speed but was also always after Pac-Man; his name is really 'Shadow' and that is because he always 'shadows' pac-man.
the others like 'Bashful' (inky) are just cruisers on the maze and don't initially chase Pac-Man until visible. they eventually find him and sometimes dead-end him on a corner. that's how i always lose. they get me boxed in with no way out.
Either way i always laughed at the death sound. esp today it is so 1980s.
There's also a neat fact in the game crashing if it was ever won. the game was never designed to be beat, so level 256 after completion would wipe out the game or make it graphically impossible to go further. the game had to draw fruits (at the bottom) in 256 bytes, so after level 256 there was no way the game could draw any more fruits, so it tried combining the previous 256 fruits in attempt to draw a new one, but it was impossible and would crash the game.
http://www.youtube.com/watch?v=2K7orNZNGU8