I'm not sure I understand about the clues. When you click a square, it inverts the colour of that square and the ones around it (up, down, left and right).
Oh I see what you mean. I can see a few patterns around but I've not got a good understanding about how to solve many of them, so I can't logically work through things after a certain point.
Past a certain size I lose all intuition and start clicking everywhere until something manageable appears.