This is an interesting Twine work with an engaging premise, more what-happened than whodunnit. The best aspect is the plotting and pacing: much of the work pulls the reader along and creates a tense, suspenseful experience.
I think the weaker points though are the way the work skips backwards in time: it sometimes works, but other times frustrated me and killed the momentum.
Characterization sometimes felt a little flat. Typos and some over-used language contributed to this, but I felt somewhat disconnected from the character. Despite that, there were several scenes where characterization was strong: at one point in the work I tried to pick the more "noble" or "appropriate" path, and was pleasantly surprised by the protagonist refusing to follow the order. There were a few scenes like this throughout the piece that reinforced the character and I thought these improved the overall work. I didn't have a strong sense of place, but that may be an unfair assessment. I didn't get a sense of Boulder, the setting felt more like a generic urban setting.
Audio, video, and interface all score high and were satisfying.
I didn't find the plot entirely convincing, particularly in the second half, which I thought wasn't as strong as the first half. I think this is a good but uneven work, that could benefit from a little tightening up, but should appeal to fans of Memento-like themes and questions of memory and identity.