It took a second to get the muscle memory down for switching and activating, but it works well! I like that the pattern you've made to the music starts off simple to get the beat, then only blue on different sides to get it through my thick skull how switching works, then gets more intense and interesting! The added difficulty of switching is definitely worth it in my opinion. I'm a big fan of the rings that start large and narrow down onto the target to stay on beat too, rather than a classic "zone" that the things reach.
The collected birb and fishy friendos persisting between plays make me want to crash the game by collecting too many, but I will resist the temptation.
I ended up with a score of 81,486 after my third play! Great work :)