This comment will have MAJOR spoilers under "view rest". Despite my complaints with this game I do think it is definitely worth playing and has a lot of positives. The presentation is incredible and the characters are all pretty great. Unfortunately I just tend to have a lot more to say about negative stuff.
I feel like this game probably should have included in the description that it was inspired by zero escape. As another commenter already said you kind of need to have played that series to understand a certain something in the story. If it was just the two references that happen in the prologue it would have been fine but there is a major plot point right out of zero escape and it's not even ever explained... Below are the major spoilers.
I feel the final chapter and epilogue was rushed. Before chapter 4 it felt like we were slowly building to something, introducing new elements and then before we know it boom the mastermind is gone and the game is over now here's a big explanation of the game's mysteries, besides Echo's power. Like....what???? It completely interrupts what was previously great pacing and shoots us into an ending where a whopping half the cast survives? Not like I wanted anyone else to die, I love all of the survivors but it just feels a little disappointing especially when I felt chapter 3 had been the best trial so far. I would LOVE to see more from this dev and I'm really sad that the game ended so soon...