There are few games that define a genre, transforming them into games for history books, and that’s Super Metroid. It refined the exploration-by-abilities genre we know now as “Metroidvania”, much like Dead Souls defined the “Souls” genre, and so forth.
On the other hand, it also had it lows. Like that entry you don’t talk about that we hope someday is declared non-canon and all copies destroyed by spontaneous combustion.