Wow, you've definitely leveled up your first-person game skills! This is much better in a lot of ways than Flushed (although I still like that game too).
In particular the use of old television sets for level lighting was really neat and made for an interesting environment.
I didn't find it necessary to use the flashlight (actually I forgot it was even an option until I got all the way to the end).
Your character models have also improved. The zombie guys looked pretty grotesque (in a good way).
Voice acting was a nice touch!
Overall the game felt like it could have been a flashback/dream scene in a game like F.E.A.R. or something along those lines.
Am I reading right that you made this in 48 hours? That's impressive for such a short timeframe!