The money in Mr. Krabs's jar gradually decreases over time. When the jar becomes empty, the game ends. Matching similar coins not only scores points, but also adds to the money in the jar. There is also the Shuffle button; when it is clicked on, the board will be reshuffled but the money in the jar will be decreased. When the money reaches the upper line on the jar, the player is taken to the next level.
There are two special types of coins. A Coin Bomb, when matched with other coins of the same color, will clear the area around it. Rows and columns containing a Locked Coin cannot be moved.
Performing special feats, such as matching more than three coins or matching more than one group in a single move, gives bonus points.