This is one of the best sci-fi story I've ever read. The question what is the boundary of human existence is very intriguing and the horror ambience is very good. When a horror game doesn't have cheap jump scare, it's always a good sign of how confidence the writer and the developer presenting their game's narrative. All the great things about this game is marred by 2 things: confusing monster segment (the one in the theta) and terrible bug at later stage. The former almost killed my interest in this game. I didn't undestand the monster's patrol pattern and the correct progression path, and I groaned and I resorted on reading walkthrough. If you haven't got this game and interested on this game, then it's a no brainer, this game is very recommended (and maybe play it on safe difficulty to avoid frustation). If you liked this game, don't forget that there's supersecret file.
If you want to know what happened if game development will be stuck in 2D, this game is the perfect example. The developer use 'high-bit' term, and I couldn't agree anymore. The pixel arts is so beautiful! The attention to detail is absurdly high. The animation is very good, the music is pleasant, and the sound effect is appropriate. But the story and gameplay itself..... The gameplay is okay, just okay. It's not bad, but not that good. Flying feels weird (I like tapping double jump, not jump and then direction) The platforming is not challenging enough, one of the boss have difficulty spike but that's the most fun boss fight, The story is borderline anime cringy, your character is lonely because everyone around him is a dick without good reasons. The story is trying to epic but full of mystery-science-non sense.