Really vivid imagery, I liked the haunting way that you described the memories. One thing that I found somewhat confusing, when you reach the first choice about whether you swim, is that supposed to be some kind of daydreaming vision? I couldn't tell from context.
Another thing I would suggest from a game design point of view is that if you're trying to simulate the idea that the player is having circular thoughts, looping back to the exact same text can be a tricky form of generating repetition, because human psychology tends to block out multiple instances of the same thing. A better way to show that, I think, is through interweaving a common theme in a way that feels the same over and over, but is technically somewhat different each time. This is a common method for generating nostalgia with game remakes, for instance, and it's often used in musical continuity to remind a player of a mood or place they've already been. Maybe each time you loop back you get a slightly different angle of the same set of memories? (Certain details standing out more, smells, sights, etc.)
Great descriptions though, good job.