I have not yet had a chance to play the game, but the trailer does present the game as very unique concept. The artstyle and the music together help reinforce the atmosphere that something is wrong, even though it all seems fine, and it seems like this atmosphere is what the horror feeds on. It definitely looks like it's worth checking out.
I listened to the soundtrack, and I enjoy its sound. It's sort of retro, but not full on retro. It's something that I might listen to while taking a walk. Conflict and Drifting Away in particular are quite unsettling, the former with its chaotic sound, and the latter with its slighly off-key notes that repeat periodically. It's quite ear-catching, and it dies make me more interested in checking out the game.