This is an excellent science fiction story, with competent production values, and a great performance by Cara Gee (The Expanse). If you appreciate science (the first part of Sci-Fi), then this movie is for you. The story and EXCELLENT conclusion, present cogent scientific principles which are far more compelling than the movie it initially appears to analogize.
It is unfortunate in this day and age that the consumer market demands the simplicity of a comic-book videogame superhero plot, which has little relation to actual science, but remains misnomered as "Science Fiction" -- hence rebranding of the SyFy channel to preclude actual science, for monsters and sharknados. And yes, halfway through Alien: Romulus, I found the story about as interesting as a Scooby-Doo cartoon, and stopped watching. Sorry to those of you who imagine that monsters, demi-gods, and over-the-top violence are "science."
The fact that this movie has multiple "LEVELS" (thus the title) and a sophisticated ending does not make it mediocre. Rather, it is viewer dissatisfaction with a primarily cerebral story which apparently garners fewer stars.