SmolGame - Fifteen Puzzle

Fifteen sliding puzzle consist of 15 sliding pieces placed on 4x4 grid. That way always one free place is left to move pieces around.

Goal is to sort pieces into numerical order starting from top left corner and sorting each of the 4 rows.

Fifteen puzzle became famous approximately one hundred years ago. It's self proclaimed author Sam Loyd has made small fortune on challenging others to solve this particular puzzle but you are presented with it for free and for fun.