I’m speaking carefully, because I don’t want to say too much and spoil the game for those who haven’t played but:
All video games create a sense of agency in the player. (“I made it happen,” “I solved it,” “I beat it,” “I accomplished it.”) In this particular game, the plot is about the player character losing her sense of agency — and as the player acquires new in-game abilities, the main character reclaims her agency. Gameplay is story.