I love the art and the monochrome atmoshpere. The puzzles were short but fun. I can't figure out how to get the toad's last riddles, I kept going back after solving every puzzle, but he just kept repeating "where does a thought go when it's forgotten?" Until the end when I could not leave the well.
The story is interesting, however the ending makes no sense (and I'm not just saying that because it's sad). Why would the witch go through the meticulous process of hunting down the Lifeless children, then bringing them back to life just to kill them again? If there had been hints dropped such as a character saying "The witch often uses the Lifeless in her potions" then it would make more sense. But that's just my opinion.