Pairs nicely with the free LEGO Hobbit game they gave away last week.
https://www.humblebundle.com/store/lego-the-lord-of-the-rings
https://www.humblebundle.com/store/lego-the-lord-of-the-rings
It's a fun puzzle. It's a shame you can't chose difficulty though, because it's either impossible or too easy.