15Slide

From the developer: "15Slide is a computerslide-puzzle game. It's an advanced version of the well-known 15 puzzle. To solve the puzzle you have to original order of randomly shuffled numbered pieces in the least moves possiblen by sliding pieces into the empty spot. 15Slide differs from the original puzzle of 15: except standard board size, it offers number game boards from 4x4 up to 10x10 size and 3 levels of difficulty. There are 12 board skins in the game, so you can select, how will appear pieces and its background. There is also the Table of high scores to save your records.Nag-screen and only from 4x4 to 5x5 size accessible.

Limitations:

Nag-screen and 2 levels is unaccessible