SpongeBob must go around several platforms and stomp Krabby Patty ingredients into trays at the bottom of the screen. Avoid Plankton and other unnamed plankton.
Mustard can be used to stun plankton temporarily, after which they can be crushed, while they can also be killed by squashing them with patty ingredients. Collecting a golden spatula will squish all plankton on screen. After a certain amount of time of any of the plankton's deaths, the squashed plankton will often respawn.