I absolutely loved this. The atmosphere was just so relaxing and I loved how later you implemented the mechanic where you couldn't do the whole maze with one color and then echo the rest for the other. They had to go through it slowly together. Amazing! Totally possible to play it by yourself! If it's challenging, that's because it's a puzzle game. It's meant to be this way. Tutorials were fine. It's a very basic concept.
Great job!