In the how to play bit, it says "Can you reach the max score of 720?". Immediately after starting the game, I could truthfully answer "No. No, I cannot."
Despite there being essentially no way that my capabilities would allow me to do well in this, it's an interesting concept. The idea of controlling two components separately at the same time is a nice way to ramp up difficulty for something that might otherwise be overly easy, so that's good. I also liked the touch of adding different notes of the song we hear in the menu to the rings, playing out the song (presumably) if you hit all the rings.