Great game.
I really liked the atmosphere, and the way you've made the CRT TV POV makes me giddy. Always loved games with this look.
A couple of issues I had that I feel could be changed to give the game a better feel as feedback:
Enemy health/damage: Their health was too high, and the damage they dealt was too static. They all dealt 20% damage and with the very limited health packs and ammo, I found myself dying too fast, or on purpose to regain ammo. Glad you had that many checkpoints, so it didn't feel like I was running that far every time. In addition, some feedback when dealing damage would be great. Just a little blood/goo-spray would be cool. Also the flying thing's projectiles were really hard to see, so making them glow a bit more would be great.
The audio: I'm sure you're aware of a couple of the glaring issues with this. I felt like I didn't always understand where monsters were coming from, and a lot of the time the audio was directly in my ear. On the very top of the roof, I was running around and just hearing super loud growling right next to my ears with nothing there. Otherwise I quite liked the ambiance, and especially the TV static. It added a lot. Sadly the Ambiance broke and stopped playing somewhere in the Office level besides the static.
Lastly, I think your game would benefit greatly from loading in parts. As in the room you're currently in is enabled, along with the ones connected to it. I felt the frames drop significantly while running around in the office area, which made it harder to aim and hit the smaller dog-abominations. Also, the few dead-ends you added didn't really add much, but I appreciate that you were probably planning more and didn't get time to add certain things. For example, this game with an inventory system like Resident Evil or Dead Space would be really cool if the game was longer.
Again, great game! You should be proud. :)