The hint system is good. Puzzles are on the easier side, but that's fine by me. I solved at least one by accident though. Was wondering if I had to change the tiles and - bam - the puzzle was cracked. It would be nice to get a quick look at the solution afterwards. But that's down to personal preference. You can also simply take a look at the puzzle BEFORE solving it I guess. :)
The night-time lighting of the scenery creates an nice atmosphere. The whole game is super cute. It really feels a bit like Professor Layton did somehow stumble into in the (cutified) manor from "The Seventh Guest". SpOoOooky indeed. Fun, too. :)