If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Shooter job-4 is the fourth stage of training in WPF (world protection force). In this stage you want to take a sniper gun shoot training in target boards. The training was, the terrorist hijacked the buildings, and you have to rescue the people.
Mouse - Aim / Shoot.
Spacebar - Sniper view.