I just finished the demo, this game is incredible! I'm really looking forward to seeing future chapters. The writing is exceptionally sharp and it's also very fast-paced, getting to the spicy stuff quickly while still setting up a large cast of characters. I would recommend anyone that is a fan of other adventure/visual novel series like Danganronpa or Zero Escape to give this project a try. While this game feels like it draws influence from those titles and similar ones in the genre, I think it manages to carve out its own identity, due mainly to the wonderful art and writing. The developer also makes good use of characters interrupting each other mid-sentence, which isn't seen enough in this medium.
I played the updated demo patch and didn't encounter any bugs or issues, so it seems like those were all resolved. The puzzles so far have been pretty logical and not too frustrating. I'm really excited to see where the story goes from here and how the game mechanics continue to develop. This is an impressive high-quality project for a solo dev, and so I hope D-MO is able to eventually finish this game. I'll definitely be following any updates!