This game definitely has some of the best GameBoy graphics I’ve seen! I really like the idea too, especially of drawing on a map outside of the game itself, kinda like the old days. I played this on stream today (recording here) and like other commenters I did get stuck due to the mix up between latitude and longitude. Whether due to the game or my own misunderstanding, I definitely started doubting my own understanding of which was which.
Regardless, I had a good time with it. Great job!