Marble Kaleido-racer

This is a marble kaleidoscope I made from scratch. The wheels (which turn on an axle) are the wood discs left from cutting holes in a door  to install a deadbolt. I used a small marble wrapped in wire as a directional "wheel". The driver sits back, manipulating a joystick on the side with one hand and a sphere on top with the other hand. Is the joystick for steering and the sphere a drive control? I don't know, it's up to the viewer.