In the Duck Hunt game the goal is very simple - shoot the ducks before the time runs out.
There are options in the Duck Hunt game at the start. You can select the Duck Hunt or you can select clay pigeon shooting.
Both of these are played in similar fashion. You aim with the mouse and shoot by clicking the left mouse button.
At the bottom of the screen there would be a progress bar to show how many ducks you need to shoot and how many you have shot. You need to reach the target amount before time runs out.
The Duck Hunt game is a great way to quickly spend a minute or two when you take a break at work if you want to get rid of some frustration.