A classic game of puzzle 8 (3x3), 15 (4x4), 24 (5x5) or 35 (6x6) in which player has to move pieces on board so they are from 1 to 8, 15, 24 or 35. Positions of pieces are generated randomly, but every generated game has a solution.

Customization:
You can use image as a puzzle - you can solve any image you add to folder textures within folder with game, but image name must be 'image.jpg', there are
no other restrictions for this image file - image can have arbitrary size, but we recommend you to use images with size ratio 1:1, because puzzle have ratio 1:1. You can use image with arbitrary ratio of course, but image will be stretched.

Issues:
For correct running of this game graphic card supporting OpenGL 3.2 or later is needed along with newest version of graphic drivers.

Controls:
For menu invocation press ESC key on keyboard.

You can rotate camera by right mouse button and zoom in/out with scrolling
mouse button.

Alt + Enter key combination will toggle between fullscreen mode.

Boxes movement methods:
mouse click - simple click with left mouse button at box and it will move
automatically to free position
mouse click & arrows - click with left mouse button at box and control it's
movement by arrow keys on keyboard
arrows - move boxes with arrow keys on keyboard
arrows inverted - move boxes with arrow keys on keyboard in inverted directions