I was fairly engrossed with this game, but I have to say I'm left feeling quite unsatisfied. Spoilers...
After the 2nd trial, Echo suddenly has the power to snap back to the past with memories intact in order to circumvent bad outcomes. This power comes out of nowhere, is hardly questioned, and is never explored or explained. You'd think it would be revealed to have something to do with the Ultimate Memory title, but that just ended up being fake and unrelated.
Such a power is something that you base an entire game system around (as in the Zero Escape series, Raging Loop, Life is Strange, etc.), not something you throw haphazardously into a game already based on a wholly different system (of deaths actually happening and moving forward with the story despite that, i.e. Danganronpa).
And even besides that issue, the story ended up not making a lot of sense for me in various ways. Like, Echo literally witnesses Sei murder everybody in an alternate timeline, and still insists that she wouldn't resort to killing? How does that make any sense?
The rules for body discovery in this game are never explained, but it requires 3 people in Danganronpa, so it's assumed to still be the case here, yet then it shouldn't be possible for some of body discovery announcements to happen in the later chapters.
I also don't get why Pandora didn't seem to recognize the symbol of her twin sister's school on her note, or what the purpose of the note even was, since it claimed that she was safe, and yet nothing was done to actually protect her. And was it ever really explained why Echo was made to be involved in the killing game, or why so many of the planned pairings didn't happen? An organization with the technology and resources shown seems like it should be more than capable of abducting Ashley without Echo witnessing it, for example. Maybe I'm misunderstanding something.
The roster screen for each character shows up to three other people when hovering over the right side, but it doesn't indicate what this means at all. And I don't understand why everyone has a designated flower, or how that has to do with anything.
But the main thing that didn't work for me was that the explanation behind the killing game kind of fell flat. There were minor references to "despair," but not enough to think that it's an active threat to the world in the way it is for the main Danganronpa games. So it's hard to believe that there would be a whole organization of people so willingly involved in causing so many deaths just in the name of...some rather unclear goal.
Like, what was it all for, really? All they apparently used the winners for was to run more killing games. I never got a clear idea of what they were actually trying to accomplish. There was so much emphasis on ultimate talents benefiting humanity in the early chapters and with the motive questions, but that theme didn't really tie into anything in the end. There was no indication that I recall of any actual attempt to better humanity in any tangible way despite all the effort of conducting these killing games.
I still appreciate the effort made, and how this game is freely offered, but these issues leave a lot to be desired.