The atmosphere and art style are both strong, but I did find the game's overall pace to be a bit too aimless and slow. Recollecting memories after a crash in a snow storm is a very compelling way to frame the story, but looking for anything relevant in a wide area with only the standard walking speed chipped away at my patience after a while.
I like the way the narrative built up! It felt like a slow burn that led to some creepy reveals. I did find one of the scenes inadvertently funny, however. The police calling the main character late at night then describing to her the grizzly details of her brother's murder over a phone call felt a bit silly in how quickly it happened, but apart from that the tone felt consistently serious and foreboding.
I'll also say that it would have been nice if music had been included, but that the lack of music does add to the eerie atmosphere in some ways too. I think the creepiness lends the game a slight Yume Nikki vibe, which is a nice tone to set.