This was great work! I don't even know where to start on the praise.
I loved the artwork and the designs, both the characters and the monsters. Some of them honestly reminded me of some Fear and Hunger enemies (most particularly the entity that attacks the intern).
Trying to piece together the story of the game was also fun. I didn't trust Eva nor did I trust Noh or J, but I especially didn't trust Eva because Noh was very clearly mentally out of it and was just doing what came to mind.
SPOILERS
It clicked to me fast that Eva was the Perfect Human prototype, just before the scene where the intern gets attacked. I remembered that aside from the intern pointing out that she was a patient when we first rescue him, Eva remembered the name Merck despite it being a bit hard to read at first. The plaque we read confirmed it after mentioning a Merck Johnson. I won't lie; I clocked that Eva was Merck's daughter when J consoled Eva in the room with the large computer by referring to her as [My Sweet Child] and the fact that he indicated only her escaping with the word [you] being in orange text.
As for the endings, the only one's I want to talk about are Noh's, Eva's, and the True Ending. Mostly the themes of co-dependency surrounding each of them.
I got Noh's first. I was curious honestly and was surprised at how oddly romantic it was. Sad yes, but it was strange to see him care for Moku in their final moments. He acknowledges that Moku wants to remain human/retain some of their humanity and had them form a literal co-dependent relationship. Moku only survives because Noh uses his body to protect them from outside enemies and their humanity stays intact because Noh eats away the growth on them. Comparatively, Moku gives Noh a sense of purpose to protect and survives by eating at Moku's growth. His brain can handle the pain and he can keep the growth from consuming him. Something about that, just seemed so strangely romantic to me.
I went for Eva's next. Even before they make it to the pods, Eva admits how she values Moku's opinions of her. How she wants them to like her and trust her and doesn't think she'd be able to do much without them. She states her co-dependency outright. When Moku has her escape, they do come back for Moku, but Moku isn't able to do much. They rely on her as their caretaker, and Eva, because of what she promised to force the Construction Company to get Moku, she relies on Moku's input for everything she does or doesn't do. Another co-dependent dynamic that the two of them are trapped in for the foreseeable eternity because they can't live without each other. If Moku were to succumb to the growth, Eva would lose herself and go with them. If Eva somehow loses her life, Moku's ending would be much like the Lone Ending, being constantly monitored.
The True Ending was very much a sad ending for all. I wasn't hoping for a miracle, but somehow it ended up being more tragic than anything. The last-ditch effort the Intern made to turn us away was a bit overshadowed by what followed after. Fusing Noh and Eva into an amalgamated mess and then inserting it inside Moku to take to the surface. The three of them forever bound together as humanity's last hope for survival. They all ended up losing. Moku lost the humanity the sought after, Eva never got to be a normal girl who got to go to school and make friends, and while Noh didn't seemingly have anything he wanted, he did want to protect Moku. Offering to kill everyone while Moku made a run for it was a last-ditch effort and he didn't fight it when Moku told him it wouldn't make a difference. I can't imagine the pain their new existence brings to each other. Dependent and at the whims of people who see them as a product to be cloned and sold. Just sucks overall for everyone involved.
Thank you for this creation. I look forward to your next works.