Puzzle points are used for unlocking the milestones and earning rewards.

You can collect Puzzle points by spinning in Lobby and High Roller Games. Please refer to the Scoring tab within the Puzzle Fortunes tile for more specific ...

You'll need a total of fifteen Puzzle pieces to successfully solve a Puzzle board.  

Once you reach the final milestone, your reward will be Diamond Scratchers.

You have the flexibility to collect Milestone rewards individually, and you can do so in any order you prefer once the Milestones are unlocked. Fig: Mile...

The collected Puzzle points contribute incrementally to the completion of all the Milestones, not just a single one.

Your collected Puzzle pieces can be found in the Puzzle tab within the Puzzle Fortunes tile. Fig: Puzzle pieces can be found on the right  

To complete the Puzzle board, simply drag each collected Puzzle piece to its correct position on the board. Fig: Ongoing Puzzle board completion process ...

No, a Puzzle board can only be completed once. However, a new Puzzle board with fresh Milestones will be available soon.