I expected Hexen 2 or maybe Heretic 2, but it feels more like Strife, with a proper town to explore, or even Arx Fatalis, as you expected to throw boxes around and burn wooden planks with fire spells.
It only takes a few hits for you to fall. Unreal was also quite unforgiving, but at least there was a save/load option. Here, I died a couple of times because I didn’t understand that there’s a lot of stuff that can blow up. Not just red barrels, but also red crates (no, they don’t contain ammo) and what I considered some altars, and turned out to be piles of tar. When you die, you lose some money.
Flying enemies are a bane in most FPS games. But here, they are tiny, hard to hit, almost black, and have an AoE attack that kills you in a couple of hits.