Folks - I grew up with jigsaw puzzles and kept on playing them throughout the years. I like the game, and I especially like the locking mechanism that secures a piece when it is in the correct place. But a few things can be improved:

- Hint button is too large and has no business being where it is. It should be moved up and out of the way. Maybe you can include it with the menu at the top, but with a smaller button.

- While the zoom in/out option is needed, it is one-dimensional, so to speak. What the screen needs is a hand curser that allows you to scroll its various parts in and out of view as needed. This would complement the zoom function, not replace it.

- An option to make the background lighter or darker. I've experimented a bit with the current options and the only one that allows you more visibility is the one that blurs the background. It's doable, but the option to adjust the brightness of the background might be more helpful to improve the visibility of the pieces. Having the option to add hard edges definitely helps.