Guide Spongebob, star agent of Bikini Bottom's special porous unit, to search the sea monsters and the treasure they guard. You pass to the next level when you kill all the fishes that follow you.
Arrow keys to move, space bar to attack. Collect items (coins, anchor) and power-ups (bubble maker, seashell). To kill the fishes, shoot them many times. Every weapon acts in a different way (for example, the anchor inflates them until they blow).