Thank you so much! We are also pleased with how it all came together, so that’s great to hear!
Just to clarify, it’s not how long the button is held. The mechanic is basically that holding down the button reduces/delays the force pulling the quill back to the player. The throw itself is based on a combination of the momentum of the player and the speed of the quill. Try moving the mouse through or around the spell circle and then clicking and holding when you get to the direction you want to throw the quill. The GIFs on the entry page’s gallery demonstrate some of the techniques. It definitely takes some practice and we might try to iterate on the mechanic some more to make it a bit more intuitive after the jam is over.