Thank you so much for your feedback!
About the score counter, the game already saves your progress, so you might have missed it. It shows both your current score and your best record.
I had thought about adding sound or visual indicators, and that could definitely be useful. At the same time, right now the player still feels that sense of tension, wondering if something might come from below. I will still think about adding these indicators in the future.
Thank you very much for your feedback <3