This was actually super fun! The descriptions for if something is black, brown, or dark brown is kind of confusing as to me they all looked black, but once I got the hang of it, it was really cool running around and trying to find the people. I think what this game needs most is polish. The jump button isn't really needed, and I actually got myself stuck somewhere and had to reset. The mouse also doesn't lock and disappear on the screen. The coolest part of this game was when I was on my final target, and everyone started running around. I was ready to kill my last target and say that the game was pretty enjoyable, but the panic for the final target actually added a lot to the gameplay. I remember trying to check someone and they kept running away from me, and I had to chase them around while confirming everything at the same time, then chase her around some more to try and kill her. All in all, great concept and good execution! :D
As a tip for future game jams, I recommend posting web builds for your games, as a lot of people don't go through the effort of downloading files to play games.