that's some new idea!
was fun to try, and pacifist fighting really stands out :)
i would think about some more challenges (maybe the third participant in the war?) so there would be more variety in the gameplay once you get used to it. and maybe music seems a bit repetitive when the wave starts, though the slapping sound is soo good :D
and maybe it was intentional, but "Outlast the wave" message appears after I already began keeping soldiers apart, I would love to get it before i start my work on peace :D
fresh concept, good job!