Nice starter map, which hooks with corroded metallic textures and an ominous, gloomy illumination. I like the lighting design, notably in the roofed areas where the computer panels are located. Texture work is simple, yet atmospheric and viby, especially with right soundtrack, that I guess will come later.
Also, i like using of new monsters. Zombified marines are really evil on uv, and you have to use meatshield (thankfully, we have these zombies for that) tactic against, while trying to snipe them at the same time.
We also provided we some simple non-linearity, that I always appretiate. Main difficulty is coming from hitscanners, but it is not plutoniesque, where you just getting surrounded by chaingunners, here you're engaged in some sort of tactical combat. Ammo here is never a problem, but health is, tho we have helpful secret in our expose.
Overall, this map catched me, and I'm looking forward what this wad will be like in the end. Thanks for your work!