Great use of glow effects! All those streaks for hot light make a nice contrast with the cold, desolate setting.
Definitely a challenge managing the horde, especially with the slow reload on the rifle, but I actually found that helped elevate the game. It made it more than just a routine shooter. I found myself thinking a lot about how to lead the enemies with the flare gun and exactly when and how to maximize the impact of my rifle shots.
Fun story too. I like the surly pilot, although despite everything he said, I'd still love to have gotten out there and explored that castle a bit. :)