The character in the picture below is Chain Chomp, from the Mario series.
He bares a striking resemblance (besides pacman) to a character from a game (or at least the cover art of a game) I used to play as a child on my mac. (OS7 days)

The game was an arcade shooter played kind of like Tempest, on a single flat plane, meaning you had to defend against oncoming hoards of enemies (I remember spiders).
I think the playing field was red, but I'm not entirely sure.

It is one of the only remaining items in my short list of nostalgic unknowns. Please help, if only with a name. Thank you.