What i have to do in Unbirth?

[Kfu]

I have downloaded Unbirth, i install it, everything ok, i launch it an start a new game. Everything is dark and just a bulb and another strange thing can be see, i walk around blind and just see some ¿posters? and a ¿metal door? that can´t be opened because it would be fool to get in without a ¿source of light?.

How on earth i have some ligt to see, just the walls lol!?

i can do nothing there!

help!