Funky! Love the concept, definitely a great way to add a bit of originality to the genre!
I found it a little ambiguous as to when you're supposed to click, the little yes / no indicator helped a lot but it was still very difficult to keep the rhythm once you look away, whether that's down to my own lack of rhythm or the timing of the game I can't say for sure. It ended up being a reaction test with me watching the indicator rather than a pure rhythm game.
Great work!