I don't really understand. The wheel turns, and if you turn the right way, you get orange rocks. But you don't spin by interacting with the wheel, you click sort of above the wheel, and it isn't obvious that you have to move the mouse around to rotate the wheel, because sometimes the wheel doesn't seem to move how you expected it to move. I initially thought I had to hold left-click above the wheel so it would start spinning, then release, let the wheel's momentum carry it past halfway, and then hold left-click again. I was spinning it the wrong way, unknowingly, but it was the only thing I seemed able to do. I made a bunch of orange rocks, threw them off the side of the screen, and I guess that's it?
Edit: my bad, there's a second screen to the right. Somehow found it randomly by while spinning. But... it doesn't do anything? I expected to put some orange rocks into the receptacle and nothing happened.