An endless runner-like "diving" game, where you play as "Fluffy", a baby seal, who wants to find his lost mother.

The player has to decide when Fluffy should dive lower into the ocean by tapping and holding on the screen. Once the player lets go off the screen, Fluffy will jump out of the ocean. By using the diving mechanic properly, Fluffy will be able to not just dodge rocky terrain, but also gain speed, and use momentum to fly out of the ocean temporarily.

Points increase over time, but the player can also gather more by swimming close to rocks without knocking into them and collecting as many clams as possible. The clams also fill up a power gauge that automatically drains over time.

Various powers and stage mechanics can be found, like shields to protect Fluffy for one bump against rocks, magnets to collect clams from afar, a point multiplier, a seagull with a police hat that can carry you across the stage temporarily, and a whale's spray that lets Fluffy jump out of the ocean with ease.

The game is over when the power gauge is used up, which results in Fluffy being too tired to swim anymore.

The game was initially developed for the Korean Animal Welfare Association as a donation game to protect harp seals from being subjected to commercial fur hunting.