FIG. 1 is a top, rear perspective view of a joystick showing our new design;

FIG. 2 is a left elevation view of the joystick of FIG. 1;

FIG. 3 is a rear elevation view of the joystick of FIG. 1;

FIG. 4 is a right side elevation view of the joystick of FIG. 1;

FIG. 5 is a front elevation view of the joystick of FIG. 1;

FIG. 6 is a top view of the joystick of FIG. 1;

FIG. 7 is a bottom view of the joystick of FIG. 1;

FIG. 8 is a top, rear perspective mirror image view of the joystick of FIG. 1; and,

FIG. 9 is a right side elevation mirror image view of the joystick of FIG. 1.

The broken line representations of items in FIGS. 1-9 are for purposes of illustration only, and form no part of the claimed design.