Great game! The sense of movement with Red in particular was very nice. I had a lot of fun experimenting with the physics engine, doing tricks like holding down while in mid-air to fall faster. Spamming the bullets at the end of Red's section to run super fast was my favorite part. The music was a really relaxing for a war game as well, in a good way. The color palette gave you just enough room to work with the theme too, and you definitely excelled there.
The enemy design was interesting. The enemies and player characters being so similar really highlights the idea that everything in the war here is a matter of perspective.
The sound effects were mostly fine. Perhaps a bit quiet. Perhaps needed some better impact for the player deaths in particular, with animations to go along with that component. Also, running all the way to the right during Blue's second screen caused a game over and there was no indication that would happen. Bringing Red's president back safely was also a bit bothersome due to him swinging around the stage when the player presses left or right. There's definitely room for polish, especially in terms of proofreading.
Still, the physics engine is rather amazing. I'm reminded of old European PC games like Turrican, with some Splatoon DNA of course. Extra points for the opening cutscene. It made me feel bad for laughing.
Overall, fantastic game.