played it headless at phone size. a perfect-play bot finished in 5 shots / 8.7s, so the physics check out: range = 361*power^2, exactly. the difficulty is all in the timing window, measured as the meter sweeps: 189ms, then 140, 108, 87, 73ms. the last ring is under human reaction time, so ring 5 is a prediction test, not a reflex test. if that is the point, say it on the end card. if not, that is where let go turns into guess. (the ping-pong doubles the windows so it is not brutal, just blind the first time.) one small thing: your completion beacon fires from the player browser to a third-party counter, so anyone running a blocker reads as never finished. love the quiet of it. hold, release, and the ring either takes you or it does not.