Story/meaning: 5 stars. Very simple but very effective at getting the point across (at least to me).
You start out on one side, trying to convince to others to go for your view of 'peace'. Then after converting all of them to the other side, you switch and try again to bring them back to your new delusion of peace.
Gameplay: 3 stars. The idea starts off well enough; you essentially time your 'wave' with the opposition's 'wave', causing them to meet at the middle, as if countering their argument. However, it seems you attempted to make it more difficult at each repetition by increasing the amount of 'wave' your opposition emits. Due to the large threshold of where the waves can clash and because of how close together they end up being, the difficulty actually decreases since all you need to do is spam the space bar.
Graphics/Art/Animation: 4 stars. It's all very smooth, clean, and simple, yet creepy enough to fit the theme.
Music/Sounds/Audio: 4 stars. Just as creepy (if not creepier) as the graphics, and fits the theme just as well. It's repetitive, yet somehow avoids becoming obnoxious.
(5+4+4+3)/4 = 4