Each puzzle runs as a standalone .exe file on your computer. No other software is required.
All you do is download the puzzle file to some convenient place on your computer (like the Desktop, or your My Documents folder).
Double-click on the puzzle icon to start the program. When the program loads, you'll see a miniature of the
puzzle picture. Double-click on the picture to set up the puzzle.
The "Easy" puzzles have about 30 pieces, "Medium" have about 60 pieces, and "Hard" have about 90.