That was fun ! It gets quite chaotic at some point which makes it even more fun, and i like the twist where instead of having a game over and dying if an enemy converts you you just join their team, where you could be doing great and have the most population and thet bam you're on the least populated team. I don't know if the background's color is randomly chosen but if so i have had one tiny problem, i got a very bright color and the white crosshair was difficult to see, so maybe have that color a bit darker if you can.
Other than that , no real problem with the game, i like the pixel art, the UI is very clean and themed accordingly to your art direction.
Most brutal moshpit simulator 2020 would mosh again ! :D congrats