Currently, we're implementing the idea of player phase (blue notes) and enemy phase(red notes).
When the blue notes are hit, player executes attack while enemy is damaged.
When the blue notes are missed, player fails to execute attack.
When the red notes are hit, enemy executes attack but player defended.
When the red notes are missed, enemy executes attack and the player is damage.
Hope that helps to clarify what's happening in the video!