XYZZYnews: On Jigsaw and "I" - Article by author Graham Nelson on the ambiguous gender of both the protagonist and the love interest in Jigsaw. - http://www.xyzzynews.com/xyzzy.6e.html
Review by Gareth Rees - "Jigsaw is extremely good by the standards of existing text adventure games, and certainly good enough to be worth paying the compliment of taking it seriously." - http://www.doggysoft.co.uk/inform/crit/jiggy.html
Baf's Guide to the IF Archive: Jigsaw - Rated 5/5 by Carl Muckenhoupt. "Huge, difficult, exceptionally well-crafted." - http://www.wurb.com/if/game/117