Link: White Jigsaw - Flash game

The game starts you off with a basic 4x3 puzzle, and gradually increases in complexity as you progress (the next level is 5x3). The pieces snap into position as you drag them, and they all seem to be aligned correctly, so no rotation is needed. This really helps - I think if they could be rotated it would get a lot more confusing, especially since they're blank so you can't match pieces of the image to figure out the orientation.

While the game doesn't save your progress on a single level, it does let you carry on from the last level you reached before you stopped playing. All in all, it's a great way to rekindle your love for jigsaw puzzles