Spiders appear as blue spiders with eight legs and a body with eyes and a mouth. Their appearances are usually uncommon throughout the game, and only one usually appears in a level at a time.
The spider follows Blast-Man Joe when he and the spider occupy the same space. It walks at about the same pace as Blast-Man Joe, typically taking the shortest route possible in order to reach the character fast. Spiders can be destroyed if they are caught in the line of a bomb explosion.