Yeah that's kind of intended. Machu Pichu and Washington are the last two airports. After that it's just a game of survival until the spawn rate becomes impossible.
I think this has potential to become a real game though, it's so mesmerising.
Hi, thanks for trying it out. Indeed it's named after Lester Eli Dubins, who proved that the shortest path between two points with specified tangents, with constraints on the curvature, is always composed of circular arcs of that curvature and a straight line segment.
I just posted an update that should fix the drag and drop issues. It only happened on devices that had screen scaling enabled (e.g. retina or 4k displays), because we didn't take into account the screen scaling factor!
