Snake! (1982)

Publisher's blurb A fast and fun action game for one player. You're a big snake roaming around the screen. Mice, rabbits, eggs, and feet appear at random. Your mission in life is to bite these targets. You have to be quick - the targets don't stay for long. The main problem is: you always seem to be running into the wall or into yourself (the longer you play, the longer, and harder to avoid your tail!) [sic]. Snake! keeps high score and requires a joystick.