Rocket is a Zen game to shoot drones with a rocket. You can select, even in mid-rocket-flight, your speed, with the right-side top and bottom buttons. You fire your rockets with the middle button. The % of hits is based on the number hits over the number of rocket launches. The Zen of this is that the % of hits is only counted when you fire the rocket. You can let the drones go by for hours with no change to your score.