puzzle15

This is a 15 puzzle (also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square, Sliding puzzle, etc.) with different levels.

In the first level you should arrange 15 bricks with numbers 1 to 15 in order, as in any traditional 15 puzzle. Then, in the other levels you should arrange bricks with other things than numbers, such as Greek letters.

But of course, if you only want a traditional 15 puzzle you can stay at level 1…