As far as anyone knows, you meant it to be that way... but if it bothers you enough to make you disgusted with yourself then I would say, take the time to change it. Otherwise, you will wince every time you see it. What would happen if you turned all the blocks with the lighthouses the same way, and then arranged them a different way so they work in that direction? You might need to pick out and change a few pieces, but maybe not that many. In the end you want to be happy with yourself!