Possible Clues:

• Many-legged arthropod
• Many-legged creature
• Invertebrate with many legs
• Atari game named for an arthropod
• Creepy crawler
• Video game where you shoot mushrooms
• Many-legged insect
• Many-legged creepy-crawly
• Creepy type, wanting coin, taking money at first from bar
• It's not really a hundred foot long