Drag the blue pin to set your destination. Once a search is running, drag the red dot to simulate driving -- it updates live as you drag. Reach or pass the highlighted candidate without confirming it, and it'll get auto-rejected; drift toward a different candidate and it'll become the new top pick.
Factors in the current time -- e.g. a blue-zone spot may show as fitting a 2-hour stay right now because it's within the free lunch hour or overnight, even though its normal cap is 60 minutes. See README section 9.2.
No more candidates nearby, even after automatically widening the search radius. You can push further out manually: