One of the best visual novels I've ever played, if not the best. Of course, it is just the prologue for now, so I might be grasping at straws so far, but the game seems spectacular!
The premise is an interesting take on the "coming of age/mystery" genre, and is engaging with themes you don't often see with it, like death and gender identity. The characters are very fun, and just this short demo got so much of their personality on display. The differences between how characters act towards depending on your gender is clever, and I look forward to how the story plays with that concept. Detail after detail subtly points at how the story will go, and illustrates just how well thought-out this game is. I'm biased here since I'm queer, but the feature with the pronouns is amazing. It means so much to me to not have to fit in with the binary she/her or he/him, and that I can mix and match to my heart's content. The ability to use neo-pronouns is also a huge plus in my book.
All in all, if you're looking for a new game to play, I heavily recommend this one. I have high hopes for where this game will go, and cannot WAIT to see what Koko is cooking up!