continuous compensatory tracking task (CTT - Makeig)

Does anyone happen to have made (or would like to make?) a
compensatory tracking task as the CTT of Makeig? Either within
psychtoolbox or cogent or otherwise within or without Matlab? If so,
would you be willing to share this application?
For those that may not know the name: it is a task in which a joystick
or trackball is used to try to keep a disk, that tends to slide out of
the center of the screen in a random direction, within a small circle
on the screen.
Thanks!
Eus