Quadrants M14 and N14 are complete
M14 is the main field of the Animal Village, Marin can be found singing here late in the game.
This quadrant contains the Chef's Hut, and that's about it.
Possible solution for arrow physics, I'm thinking the way I'll handle this is, if you press the button you have your bow assigned to, it will fire an arrow straight until it hits something or flies off screen, and if you hold the bow button down then Link will fire the bow upwards and you control where it comes down.
I also think I have a solution for getting the Eagle's Tower to actually look good in the overworld, more on that later.