This was an interesting game to play, and it took me a few breaks away from the keyboard, mulling things over, to solve all of the puzzles. Each of the "cases" worked really well, and were satisfying to solve, because they all made sense in terms of the story. One constructive thing I would say is that there were a couple of situations where puzzles required multiple steps to solve, and I wished there had been a hint that I was on the right track after having done one or two of the steps. The example that sticks out in my mind is (being vague to avoid spoilers) how to deal with the campers in the woods. Having taken one step that seemed necessary (and turned out to be correct), the campers didn't change their reaction to me at all, so I thought for a while that I had the wrong idea.
Finally, I think that you managed to pull off the very low resolution graphics nicely, and gave each location a nice flavour that supported the text very well.