The objective of the game is to move the blocks so that they are in order from 1 to 15 with the blank at the lower right corner in minimum time and moves.
You can move the block by clicking/tapping or swiping.
Different board size is available (2x2, 3x3, 4x4, 5x5, 6x6, 7x7, 8x8, 9x9)
Keywords: all 15 puzzle, fifteen puzzle, 15 puzzle, gem puzzle, classic 15,
puzzle blocks, sliding tile, sliding puzzle