Place the particle balls above the line and press play to let physics do it's work. Balls of opposite polarity annihilate each other. To clear the level there should be no particle balls remaining.
Jump out of the water and land on boats to destroy them. Sink your teeth into anything that moves. Use the WASD keys or the arrow keys to move. Press Crtl or V to bite. Dive down deep and then straight up to make a high jump.
To install a piece of the bridge, click on a green anchor point where you would like it to start and draw a line to where you want the piece to end. To remove a piece of bridge, scroll on top of it and click the left mouse button. To delete multiple pieces, click on the junction between them. Click and drag to scroll around the level. To zoom within the level, use the + and – buttons.