Slide puzzle

A slide puzzle is a game where helps one's thinking power agility.
This game is designed for all age groups.
Game play:
In this slide puzzle first click on start. then either you can click on randomize and play the game or if you want to increase or decrease the difficulty you can tap on top right hand corner where you can see 3 dots vertically.
and then click randomize then start playing using the empty block for movement.

Game consist of 12 levels

first level is 3x3 and the last is 14x14
and level 1 being the easy one and level 12 being the difficult one.