>>42706216If this is a rom hack, draw a rectangle the size of the screen, and move it around. If only one kind of tile is visible on the screen, you're doing it wrong. If you have to alternate directions on the d-pad to move diagonally, you're doing it wrong.
Imo, the map is way too huge, and will be hard to populate, especially on a GBA screen. There's many similar shapes you can use that are more "rectangular", can be made smaller and thus are better fit for a game with 4 walking directions and a small screen, while preserving the idea.