I'm glad both sides learned to co-exist in the end, if only it had happened before so many lives were lost! (You say you didn't have time to put in a proper ending, but that's much better than I managed!)
I was a little confused at first, being a sniper I felt like I was supposed to stay up on the ledge where I spawned in the first level, but then ran out of ammo. I didn't realize I could jump down and interact with the rest of the level until my second attempt.
There aren't many sniping games out there, I feel like, even though it's a fun concept for games. I liked the attention to detail with bullet-drop. I also liked being a tiny person running around in a 'giant' world. :)