I finished Oxenfree the same day I played it but since it was quite short I thought that I would 100% it before reviewing. When I started playing Oxenfree I thought that this would be a one time play and replaying the story would just be the same, I can assure you I was wrong, although you are replaying the game, there are changes to here and there so I do suggest you play it a second time once you first finish the game.
The atmosphere in this game is great and the story is also well done. I suggest that when you play you use the wasd keys instead of the click to move as it is clunky and does get stuck on walls a decent amount of the time.
Choices really do matter in this game as the way you play drastically affects how the characters see and interact with you, this is also why I suggest playing through the game multiple times.
Lastly, a note for those who want to 100% it like I did you would need to do a minimum of three playthroughs for all achievements.