After 2-3 playthroughs, I finally understand what's going on. At first, I did not understand why do I have to shoot. Yes, the game told me there is a traitor among ourselves and I must shoot. However, without character development, I have no sympathy with the characters I am about to shoot. It is like watching a war movie not from the start, but from the climax when it is about to end. The audience won't have the sympathy with the characters - it feels more like... these people are strangers that I do not care whether they die or not.
In addition, are you monitoring the messages that the players are feeding into your game? I got messages like "@@@@@@@@@@@" and some other meaningless text, and I was confused the first few times as I did not know these are other players' text. In fact, I was thinking, is the game glitching up?
Question: in each playthrough the characters change. There are deer, worm, owl (?), dog (?). Are there any significance toward these changes?
On the other note, I see this is an art game you are pulling off here. Very impressive idea and concept, but watch out for the execution. This execution relies on other players' input could either make the game shine or flop for the next players. (I was confused in the first playthrough so I ended up shooting the monkey cuz he bad mouthed the most among all the characters, and I was still confused after shooting the monkey. The second and third playthrough, I start to understand what message are you trying to deliver.)
The visuals and the music match the tone for this artistic game. I don't have any complain regarding those. Good job with those pixels and piano there.
So all in all, a unique experience you are giving us. Great concept and idea, but I suggest you thinking about the execution part some more as it wasn't until the third playthrough that I understand what message are you trying to deliver in this game.