- Brown ball is physically simulated (has inertia) - A program controls the ball only via two thrusters (x/y), force represented as orange bars - Program's go

- Brown ball is physically simulated (has inertia) - A program controls the ball only via two thrusters (x/y), force represented as orange bars - Program's goal is to deliver the ball to a given point (last click position) There is a link in the footer: https://en.wikipedia.org/wiki/PID_controller https://en.wikipedia.org/wiki/PID_controller which explains what's a PID controller in this case.