Improving the puzzle

This puzzle can be made more interesting in a number of ways. Some ideas have been listed here. You are encouraged to add more features of your own as well:

• Allow removal of pieces from puzzleContainer to pieceBox
• Take a rectangular image where number of columns and rows are different
• Add a countdown timer to check how long the user took to finish the puzzle
• Display three to four images to users and allow them to select one image to be used with the puzzle