It took me 4 attempts and one Google search of a picture of a real giraffe skeleton to complete the puzzle. And it was quite fun! I liked how the challenge progressed from a more or less straightforward human skeleton to a quite unexpectedly difficult one of a giraffe. And I also liked the sense of humor and writing! Just overall a nice game.
My only complaint would be the lack of an option to restart the puzzle completely. The "X" option was cool, but it didn't work for the inner tiles, so if you missed those, you would have to start the game over, which was frustrating. Also, the game didn't restart after finishing, as I expected, but that's just a minor nitpick.