The glitches no longer seem to be entirely visual. I've had several instances of zombies stopping in place, continuing to do the walking animation, but not moving until killed. It first happened in an I, Zombie level. It seems to happen a lot...
I recently started playing this game again after at least a decade. This file is left over from then. It has a complete adventure mode and most of the minigames unlocked.
However, playing through adventure mode again, some of the UI elements are...
I went to a garage sell last saturday, and the lady had a PS2 for sale, but she had a sign on it that said "Nintendo -$50", had to laugh, almost bought but she didn't know if worked, and she didn't have controller or cables, so I passed.