Had (maybe still have?) the physical cartridge for this game and remember playing through when it was out, though can’t remember actually beating it. I don’t actually remember much about the game apart from the art style, though it hadn’t struck me as particularly groundbreaking, other than that sort of investigative game hadn’t been a wildly popular genre on Nintendo systems before. I remembered PC games that had used those mechanics, but it hadn’t really been a thing on consoles at that point.
It randomly was one of the first games I played on my DS. I was playing it for two or three days straight, I couldn’t put it down. It was like reading a really good book. There’s also a Europe/Japan-only sequel called Last Window: The Secret of Cape West if you’re interested.