Just completed it for stream (it wasn't on YouTube)
Overall, I liked it. SPOILERS:
Introduction is pretty dark for me, while in gameplay terms experience was pretty good. Quests don't make much sense (why you can't break gate with crowbar you brought from subway, or break boards which cover one of passages in basement of subway with same crowbar?), but they add variety and action. Exploration is pretty solid because of atmosphere game pulls off: snowy suburbs, snowmen, poor women and men you probably work together with, and especially lonely section in the end. Boss fight is very solid because you have to prepare by finding supplies and you have to manage your movements because Santa is faster than you, and merely at same speed when you're running, so even shooting him from distance is still work.
As horror, game didn't worked for me. The way santa-killer appeared first time and was just going around without noticing me like he's blind, killed all tension around him, and boss fight shows him just as regular guy, who stronger than you, but he's still not unnatural being which long forgot about wounds and pain it can FEEL, not inflict.
Overall, whole game feels like B movie. Not serious, cheap in some places, but still made with care and love, and there still people who adore such style. I'm one of them.
4/5?