Snailbait!

Publisher's blurb Don't let the name fool you. This game is arcade action all the way! Your job is to protect a flower bed from an onslaught of killer snails. You are armed with a spraygun full of insecticide (environmentally approved, of course). As they zip across the field on the way to chomp down your flowers, the snails lay eggs which you'd better destroy, too! Keeps high score.