Enjoyment 4/5: the game was overall quite fun to play. It was engaging, and it kept me in a flow state the entire time. The only thing keeping it from a 5 is personal preference.
Execution 5/5: it achieved exactly what it set out to do and didn't fall short at all.
Sensory 4/5: it's very pleasing to look at and keeps a consistent, nice-looking style, though it can be harsh on the eyes after a while.
Metroidvania 5/5: no notes. If you reduced the genre itself down to the bare minimum, you'd get this.
Relevance to the theme 5/5: the game could not be any more minimalist without it suffering.