I liked this game! Turning the handle of a cotton candy machine is a good use of theme.
If there's any feedback I could give, it'd be to ensure that the player can't just ignore the spinning mechanic. I found that you can just move the handle side to side instead of in a circle, and it produces the same results.
Also, I would put the cotton candy machine in the middle of the screen so that the player has more room to move their mouse around it.
Another issue I had was that I didn't know I could hold down the "Add Syrup" button. I was stuck spinning the machine with only like 5.0 of syrup in it like a fool!