As some people have mentioned, the game would benefit from sound. Because people influence each other through talking, crowd sounds might work. I also agree that the mouse click was difficult to use.
I would have liked the game to be slower in terms of people changing colour and the walk speed. People were changing so quickly, I didn't have time to see what was happening and think about what the best move would be.
The current layout of the map is too open. It was difficult to isolate people especially as they were moving quickly. I ended up trying to hit the minorities with witnesses (that sounds terrible) because that was the easiest way for me to change people's colour. It could be helpful if the people had to navigate streets of varying sizes. You could hit someone if they walked in an alleyway, or there may be more open streets where it is more risky.
It would be interesting if people stopped to interact with each other. For example, people would stop and meet in different size groups and a little speech bubble could appear above them indicating they were having a discussion. The player could choose to break the conversation up or leave it as is. I think that the idea of people influencing each other through interaction is a really important aspect of the game.
The game's concept is very interesting and has a lot of potential. Loved the idea of people changing from witnessing an attack. If you do work on the game post-jam, I look forward to playing it! Great job.