That was quite a surprise. I wasn't understanding the concept at first but the background music was super soothing and, to be honest, I kinda needed something like that today. It's hard to evaluate as it was a very different experience, but I'm glad I got to play it.
I'd suggest allowing the player to skip the intro on play again, or making the letters appear faster. I know it's supposed to be a calm experience but I got a bit anxious as I felt the letters were showing up too slowly, but it's a really minor thing.
Maybe adding a gentle beep to sound when the player finishes a phrase, I raised the effects sound to the max but I think there was no sfx when you finish a phrase. I also didn't understand why there were pipes and some repeated words when I started writing a phrase, but I didn't bother much about it anyway.
Oh, and perhaps making the phrases that show up once you complete your phrase could have some fading effects to look pretty, but that's just a suggestion since I really liked the background and kept on thinking on ways to make it even more soothing.
That being said, great work and thanks for the experience!