I LOVED this game. I had been looking for an interactive fiction game that would be atmospheric, complex, and entertaining to explore the puzzles. This one hit all the marks. It was hard, but once you get into a rhythm of how the puzzles work, it becomes easier. I actually didn't look for hints until the very end for the final scene.
If I was to share one hint, which I'll hide (Spoiler - click to show) is every person should be accounted for in each scene, assuming they are alive. So, if you've only found person 1, 5, 7, then look for the others elsewhere in other rooms. Once I got that, it became fun to see what I could figure out.
Anyways, this was a fun game and enjoyed the whole premise. It was creepy, too. It was one of my first games back into interactive fiction and inspired me to play more.