Hey there.
I think your lyrics effect has a good synergy with the background.
The particle effect in the first kiai is also good.
I think your use of hitobjecthighlight is poor. You use it too much, the colors don't fit to the combo colors and both the combo colors and the hitobjecthighlight don't fit to the background.
It has a bad aesthetic. Use it in spots where it has a bigger impact only to support the music. Select combo colors that fit the background and have the hitobjecthighlight match that color or carefully select it with the rest in mind.
The particles in the 2nd and 3rd kiai both don't look good. The color doesn't match and the flow of the particles doesn't look natural at all.
You shouldn't use the Overlay layer for this.
The Overlay layer is strictly intended to directly interact with gameplay elements.
Put your effects in Background/Foreground instead.
Good luck with your storyboard! :-)