https://www.twitch.tv/videos/2563708226
To preface - I enjoy VNs and I do enjoy a good story. A good story can sell me a game even if gameplay is pure torture. Sooo...
The story is a bit too cliche. At least for now. The "kid is not actually a hallucination but a ghost" was delivered way before the ending and was laid a bit too thick. Called the "beyond: 2 souls" plot twist in the second room of the basement. So there's that. I don't think that the "living person and a ghost adventures" type plot can't be explored, but it definitely needs more hook than "let's find out why you was aborted".
As for characters - dad has barely any screentime, so I dunno about him. Kid is alright, but the girl is INSUFFERABLE. Maybe that's due to personal taste - but I have zero attachment to her - and she's supposed to be main character. She seems to be the dominant one in her relationship with the ghost, which doesn't win her any favors, and... I dunno. She has zero motivation for anything, so "let's go find out why you were aborted" plot is a bit off. I guess her relationship with the ghost felt undercooked? I can understand why the ghost was upset at finding out the truth, but the girl is a lazy entitled slob who didn't care about getting evicted - why would she suddenly feel bad for the ghost? The emotional connection is implied, but it's not actually shown.
So there's that. The scifi basement is... eh. It's there. Not enough info about what's going on. There was the mention of something apocalyptical, but that can also be schitzo ramblings. There were those schematics of 2 entities chained, but again - sure, why is that relevant? I figured it out before ever reaching the scifi basement. That's another problem with the storytelling imo - once I already figured out the upcoming plot point - I need something else to sink my teeth in, and there was not enough unfortunately. I feel like scifi basement was the perfect place for you to start the next plot point setup - instead it felt like you REALLY didn't want the player to miss on the "he's actually a dead kid ghost" twist.
Puzzles work fine, graphics work. One minor nitpick - I felt like whiteboard diagrams were a bit too clean. Back when I was working at the office the whiteboards were either wall of texts, or crude scribbles, or an extremely detailed picture of a rooster that one guy drew when he was bored. Some of your diagrams felt like printouts or drawings from a zoom whiteboard, not an actual physical whiteboard. But maybe that's a nitpick.
I may be too harsh, and I apologise for that - but I do enjoy a good story, and I wish I could enjoy yours - but right now it feels a bit too barebones for my liking. I just wasn't hooked.