Virtua Worm by ComradeOj is a cross between Snake and Pac-Man. You have to navigate through a maze while eating food pellets. Each piece of food adds a body segment. The goal is to eat every piece of food in the stage without running in to yourself. There are 15 stages in total.

http://www.sega-16.com/forum/showthread.php?31123-Virtua-Worm-for-SEGA-Genesis