As a fulltime killer, you are going to be clicking and killing. In order to apply to be a fulltime killer though, you have to prove your worth. Wang and his bodyguards need to be killed. You have to be able to do it without getting shot and you have to do it in a shorter amount of time than the other applicants. Use the mouse to aim and use the left mouse button to shoot. One of the hardest parts is finding all of the victims, but it can be done and you have to do it quickly.