A clever hack! It exploits the tendency of each screen to have impassable obstacles (rocks, trees, walls) around the 4 edges of the screen, with optional openin

A clever hack! It exploits the tendency of each screen to have impassable obstacles (rocks, trees, walls) around the 4 edges of the screen, with optional openings. By using a separate palette for the middle area, the screen as a whole looks more colorful.