Interesting idea well executed ! The graphics and sound are good enough. I liked how removing the shooting mechanism transform an action game in a game more focus on the ambiance ! There are also some very nice details like the number of weapons that the army use or the fact that you can continue to see the battle even if you die. It add to the immersion.
In the negative points, I would say that you can too easily survive if you just run in circle so I thinks that it needs a much higher difficulty/others mechanisms that force the player to have a more various behavior.
Good job !