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This is my version of the classic 15 Puzzle. It should be obvious how it works, but in case you weren't alive in the 80s, here's a brief explanation. Select an image, select a difficulty, click the Shuffle button, and then move the tiles back to their original positions. You can only move tiles that are adjacent to the empty space. You can move multiple tiles at once if they are on the same row or column. You can click the Hint button to make all tiles light up in either green (correctly placed) or red (incorrectly placed).

The game works on phones, too, although it's not optimized for them. You may need to rotate your phone and have tiny fingers.

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