Thanks for playing my game.
Functionality to make finding the echos interactive/engaging and a peice the clues together system (similar to the fill-in-the-blank duck detective system) were on my list of things to-do but they got cut due to time. The game was still pretty silent with a week to go, so getting sounds in and wrapping up the story were prioritized. It's really hard to see these as criticisms when they were in my original plan, but were scrapped due to time.
I think you may have gotten the textbox in a state where it thinks it's already open. It's only happened to me once, so I haven't been able to reproduce it enough time to come up with a solution.
I was very grateful to find so many assets that worked together. If I had made anything it would have looked like Thomas is still very alone.