Your use of the map was really nice touch. At times the game wasn't responding the way I felt it should. I was spamming D trying the get the direction to move, and it did eventually, but I don't know why it worked then and not before. Congrats on finishing.
Viewing post in Arctic Exploration jam comments
Maybe my control description is too ambiguous... To be explicit, pressing D will enter the "finding destination" state. Then, left-clicking on the map will determine the "destination," while the previously selected unit's location determines the "source." The great circle arc is determined between these two points, and the initial direction is given to the selected unit (it's the initial direction of shortest path on a globe).