SNES game "Zombies ate my neighbors" (lucasarts as well) also used a bonus level named and inspired after the game (...or was it the other way around?). You fight these little tentacle creatures just like the ones in this game.
Just a little fact I thought I'd share. I can (sort of) help anyone with the game get to the bonus level.
We'll murder them all, amid laughter and merriment...except for the few we take home to experiment!
"I cant see S***! --YOU GO TO HELL!" --Tourettes guy