For me, the skeleton puzzle was so hard because you were required to turn the bones and the manual (at least on the Mac version) didn’t include the key command

For me, the skeleton puzzle was so hard because you were required to turn the bones and the manual (at least on the Mac version) didn’t include the key command for turning things. I ended up going online to find a hint, and once I knew you could turn the bones, it was super easy to solve.