The Player can move along platforms and climb the ladders between them. The goal is to dig holes in the platforms and lure crabs into it.

When a crab has fallen into a hole, fill it up before the crab creeps out of it.
In later levels, two or more holes must be lined up vertically in order to dispose of green and white crabs.

Green and white crabs do not die unless it is dropped by more than 2~3 floors.
- Red Crab : Killed by dropped more than 1 floor
- Green Crab : Killed by dropped more than 2 floors
- White Crab : Killed by dropped more than 3 floors

You can click the help button on home screen, it shows all the methods to kill different crabs.

The Player can move quickly down to a lower floor through the hole he has dug.

When the Player has been hit by a crab or when all oxygen has been reduced to zero, one life is lost. When all lives are lost, the game is over.

The Player gain one extra life every 10,000 scores.

Hope you enjoy it.