goPuzzleLt is the Light version of goPuzzle with only one Puzzle with optional feature to purchase 23 additional Jigsaw Puzzles. you may set the difficulty level from 1 to 4, which one and two, allows you to exchange any two slots, but level 3 & 4 limited to neighboring slots. By pressing on the Home icon, you start over. Puzzle icon is to get different Puzzle to solve, and Setting is to change the difficulty level.