I think the graphics and light scheme are too atual for an "era "feel"", but the game scheme and mechanics realy remember old fps game like Doom or Wolfenstein.
It's take some time to understand what we need to do at the beggining, but after it, the game works good.
I realy see some potential here and think it's not easy to make an fps with a little short time and, ofcourse, make an graphic downgrade to make it "look like an old game".
Furthermore, i think you make an very unique system you can use for an future job.
Congrats for the job, your game is unique, of course you think outside of the box and try to inovate in this jam.
I realy enjoy it. S2.