You and Alyx ran out from the old Combine lab, which later exploded. You need to go through the hospital to go free.
Not bad, but a short demo. Basically liked it, but did not like the way the restriction of ways - by scattering props, and the player is given a fisgan, I thought that you can scatter and unblock the passage, but you can not. I recommend changing the design of such blocking passages (I would make them blocking - field suppression due to the Combine being in the building). Also did not like the overlight in some places, I recommend reducing the brightness of the lighting (you can by setting the distance parameter "50 percent falloff distance"), and it is better to move the light sources a little higher so that they are at the level of the lamps. I would very much like to see how the development of the mod will go further.