This is great! It's such a novel concept, and a clever take on the theme.
I found myself a few times having to find an out of the way spot for the keyboard so I could look at things or wait for the next phrase to show; depending on what the goal is, perhaps there should be no safe spot, or there should be a more obvious one? Having the next phrase appear sooner after you get the previous one is definitely something I'd have liked though.