Puzzle Paints is a traditional sliding puzzle with the added feature to save the completed images to your harddrive as desktop wallpapers.
The game contains an 'easy' and 'hard' game mode. The 'hard' game mode allows you to save larger size images if you can solve the puzzle.
Click 2 tiles consecutively. Those tiles will switch places.
Click a tile next to the open space. That tile will slide into the open space.
Rearrange the tiles until you have reassembled the image.
Due to Flash security this is a 2-click process.
Press the desired size button ("XX x YY"). Wait for the game to get the image from the server. When prompted press the 'save' button. The image will be saved to your harddrive.