I played and beat Oxenfree today, so put me on the board. I've lurked before, but this is the first time I've played a game from the month.
It was a fun little game. I think I got the same ending as you KCF. Everyone was alive and didn't hate me, although I was still stuck in a time loop at the very end, so I think I could do better. I didn't grab any of the letters, which might lead to a better ending for Alex. I'm tempted to play the "continue timeline" option, which I believe is a sort of new game plus, to try for a better ending.
On the whole, I liked the spooky sci-fi mystery vibe the game had. It kept me interested throughout. I wasn't sure if the ghosts were going to be malevolent or not for a while, and I thought that Clarissa might have been influencing them for a while too.
I must have not have taken that close attention to know if I was still stuck in a time loop at the end, but now that you mention it, there might have been that visual cue when Alex was narrating at the end. I also couldn't find any letters. I clicked on just about everything, so I am curious as to where those all are. It bugged me because there they are mentioned in the pause menu. This isn't the kind of game that I would replay, but I greatly enjoyed my time with it. ---