PicPuzzles15DeZooAtChrismas

Simple but Addictive game!
I would like you to enjoy 15-puzzle for Christmas.
This is 15-puzzle version of "PicPuzDeZooAtChrismas", which is 8-puzzle and was recently released in AppStore.
Every puzzle features some animal.
All the animals assemble to celebrate Christmas in the end, so please finish all the puzzle by Christmas day. The last Picture is 24-puzzle.

The rule of this app is the same as the 8-puzzle.
Slide the tiles into a blank space to get them arranged into a cat picture.
Though the rule is the same as 8-Puzzle, you might think it is unexpectedly difficult.
When you complete the puzzles, you can watch these pictures carefully.