Really interesting concept but the core gameplay loop is not very enjoyable as it deprives you from the most important sense. And when I reach the goal, it's not as satisfying. Really happy to see experimental take on the theme though.
Also for the onboarding, maybe if you could see the level first and then hop into the blind mode where you try to time the inputs, the players could have more of an idea on what they might have to do, so the first playthrough of each level doesn't feel like just a guessing game.
Other than that, fun experience, I like the simplicity of the art style.
Edit: Ah, I just read the previous comments and these were already mentioned. Well, it's still feedback!