The game looks and sounds amazing. The level of polish is great. Also I think the game concept with the 2 different colors and attack or defend is a cool idea.
But sadly it is nothing for me. I tried multiple times, but the movement, following the mouse, to attack is just nothing I can seem to handle. Maybe if the movement and attack were decoupled I would be able to progress. But also not sure how much that would take from your original game design