Very cool FPS. It would have been cool to see more weapon variety, and an option to invert the mouse y-axis would have been welcome as well.
The first level was the strongest overall, as I felt I had to explore some, and the tight corridors meant that the melee-only enemies could still provide some challenge. The later levels were open enough that even the final necromancer was easy enough to run away and shoot without much trouble.
I also always like seeing medieval settings in FPS, so nice job.