Not a foolish question at all! If you have the itch.io app it will auto update. We haven't pushed a new update yet. The plan is to get the shuriken implemented as well as the new tutorial level before we push an update to you guys. We'll post about it in the change log. In retrospect I see how "Updates" looks like it has already been released. I'll change it to "Upcoming". Sorry for the confusion! We'll also email you when the new version is posted.