Some thoughts:
- Be sure to spellcheck. ("cemetery" and "sleuth" are both misspelled.)
- I found it a little tedious to read a clue about someone whose last name starts with a T, have to switch back to the Story to find out who that was, and then switch to the Info to find out which icon was which. At the least, I think mouseovers for the icons in the grid would be nice.
- I filled in all the checkmarks and was told I didn't have the answer, so I had to go back and fill in all of the Xs as well. That feels a little silly to me! Also, since you can't do something like "click and drag" to fill out multiple Xs at once, it meant a lot of extra clicking.