Hello, as soon as I posted stable version of we focused on more replacing placeholders and make the game look more readable, I think the UI correctly show in development but not updated at website. The purple "crank" should be spinnable by holding Left Mouse Button and dragging circular motions with mouse on that area, thanks for pointing out that since we plan to add tutorial we will try to make more sense to main spin mechanic and how upgrades work.
Thanks a lot for feedback this will change our priority list a lot.