Really tense and beautiful story! I enjoy the different card readings. The fact that they all lead to the protagonist resonating badly with them probably says a lot about how strong her guilt and attraction is.
I get the same run-time error at the line "in the end, the one who killed her wasn't....(spoilers)" on each route, which I don't think is intentional, but it actually comes at the perfect moment. The note.text displayed inside the error seems like an aside from the rest of the narration that's meant to be obscured, so... Maybe it's ludonarrative genius :3
To double-check, is the story meant to end with "it was me" or is there meant to be more that's getting cut off?