@pachi: Here's a hint. You know how the pieces will automatically snap into place when it's where it needs to go? Separate all the pieces by color and if you suspect a piece will go somewhere, pick it up and click it over the area over and over until it snaps into place. That is literally how I did mine with all the blue background I had. I'd take a piece and click it around the open area until it snapped into place. I'd of never figured out all that blue otherwise.