Overall story, setting, mystery and plot twists:
Okay this part is the high point of this anime. It is a solid 10/10 but also a minefield of spoilers. The mystery is way deeper than what you originally feel it is.
World building regarding the Alien worlds:
It shows a really simplistic view of ecosystems. Honestly there is a lot that can be imporved here. That being said every planet is unique
The plot armour is kinda strong but it is not at all a problem.
Variance in quality:
7/10 to 10/10
The overall anime is solid but specific instances in it just freefall down in quality.
The anime doesnt feel rushed at all. There are 2 48min episodes and 10 23min episodes. Every episode seems to further the story just enough.
The characters all get developed. All chars are important (Except yunhua who just, ironically, feels useless af and more like an extra)
Characters out of the ones aboard the spaceship feel one dimensional though.
Most tracks, op and ed are average. There is your occassional great bgm but nothing exceptional.
The anime is worth watching. Most importantly, it is Entertaining and keeps you on the edge of the seat wanting for more. The story also ties all its loose ends and gets a proper ending. It has its occassional dips but the highs are really worth that.