This feature is not yet finished.
Puzzle Instance Slots
Add an empty puzzle instance slot to your account. These allow you to create copies of existing puzzles on the web site that you control. A puzzle instance has the extra ability to be frozen by the owner that created it. Freezing a puzzle instance will prevent anyone from moving pieces on that puzzle until you unfreeze it. This allows you to work on that puzzle whenever you want without worrying that someone else will finish it before you do.
A puzzle instance can also be removed from one of your puzzle instance slots. Doing so will allow you to create a new puzzle instance from any other existing puzzle and set the pieces count for it.
For now puzzle instance slots are not available for sale through an online store checkout system. This is a planned feature, but there are few other features that need to happen first. Please contact me if you are interested in buying a puzzle slot.
Send me an e-mail at firstname.lastname@example.org if you are interested in buying a Puzzle Instance Slot. Or sponsor my open source work on the Puzzle Massive project.