If you see something in your door, (Bottom right) press the red button (On your desk). If you see something in your vent (Top left corner) Press the shock button above it. You can use the button on the bottom of your screen to open your cameras. On camera 5 there is a bar going down. Click the bar to make it go back up. It'll keep going down as the night goes on.
if this gets 5 likes ill make a sequel