Regarding the ending (look away if you haven't played!):
.
.
.
.
.
.
.
.
.
.
.
Having reflected further on this, it very much fits in the gothic tradition and does not 'need' to have a declarative ending. Maybe this is what was intended, especially considering the byline of 'the unsolvable mystery'. If so, well played. In any case, I had a blast and have been inspired to look at Twine myself.