Seamless Retro Game Map Texture Generator prompt

Using the provided reference image, which contains five vertical strips of a retro pixel-art game map separated by white gaps, transform it into a single seamless square tile. Remove all white separator lines and extend the terrain features (green forests, blue water bodies, orange roads, and grey castle structures) horizontally to fill the empty space between the strips. Ensure that the edges of each strip blend naturally into the adjacent ones to create a continuous, unified landscape texture without visible seams or missing data.