You have 2 minutes to land as many total inches of fish as possible. It takes some skill and practice.

Click and hold the mouse button to set the strength of your cast, release when it reaches the desired strength to cast your line. The direction of the cast is determined by the location of the mouse pointer.

When the fish strikes the bobber will go underwater and you need to set the hook by clicking on the mouse button.

Then you need to click your mouse button to reel in the fish. Pay attention to the bar at the top center of the screen to determine the proper amount of clicking needed to best reel in the fish.