Press S to open the tablet; if the tablet is in use, use Z to reboot the audio and X to reboot the ventilation; D to turn off the light and the right arrow to turn it on. For the Phantom Orange and Green, use the tablet; for the Phantom Blue, leave the mouse cursor over it; for the Phantom Catpet, turn off the lights; for the Phantom Nano, don't use the tablet; and for the Cattrap, use only the audio. That's all. Survive until 8 AM; it should be a little difficult, or easy if you're very good. A night should last about 2 minutes and 40 seconds.
There are a few bugs that I don't know how to fix, but to me it seems reasonably playable.