Use the button on the top of the screen to put on your mask if something gets in. You can monitor your oxygen and power on the bottom left. Press the red button to the right of the vent to close it, but that will drain power. Turn around with the bottom right button to access the exit door and the power generator. Pull down the lever to gain more power. Something is more likely to attack while pulling the lever though. Exit through the door at 6AM to escape.
This Actually took me a while to make. I hope you like it. I'm Gonna make night two have some use for the vent. Right now it just drains power. You NEED the code to get to the next night because you have to put it in to enter the office again.