Well, maybe it can seem very difficult, but the idea is to recreate N's castle from Pokémon Black & White, the most similar way to how it's in the game. Each tile in the game is one tile in the map, and so is to make it the most precise way possible. The difficult part is obviously the outside structure, and if you notice, it must be VERY huge to contain the inner map inside of it. So, that is, fellas.