Before you Depart is a really good oneshot VN. Wasn't expecting much novel from the May Wolf contest, but ByD definitely wowed me.
I'm very familiar with Cetus' writing, and enjoyed seeing him writing for a very different character than Judah (ICO). The writing flowed well, the pacing of the scenes worked and didn't feel drug out.
I also really enjoyed the art style for this VN, Arcadia really hit it out of the park. I liked the expressionist CGs that felt right out of an Edvard Munch painting, and some of the cutouts felt very inspired by Revolutionary Girl Utena. Only thing that i felt could use a little tweaking is that Memento didn't quite mesh. Maybe that's purposeful given his character, but the design felt a little incoherent.
I also really liked the space waltz music, it was a nice use of original music to highlight a key moment.
All in all, would def reccomend you give this a look. Stories like this have been told before, but everything works together to deliver a vivid experience.