You should be able to select an item from the menu in a single fast (distance insensitive) mouse gesture. Click down on the star, drag in the direction of an option, and release the mouse to select it. This way you can choose an option without having to stop after a certain distance of dragging, and you can memorize the different directions of frequently used commands.
This demo doesn't implement that behavior yet though - so while it looks cool this version is still missing the big benefit of this type of ui.