I agree with all of that except for the part of adding more interactions. At some point it just becomes a rhythm game like any other but with a flappy bird theme. By using this one specific word, the mechanic is tied in. The whole game is kept short, its intentionally disposable. It's a microgame. You experience it, you are surprised by it, it ends, you go on with life.
But timing things up with the music and making the pipes work better, you're definitely correct on.
Thank you for playing and the feedback!