Hidden objects plus a basic point and click type thing with a nice and spooky theme. And the achievements work on this one. Yay! It all works together reasonably well although at some points as you move through environments which can be completed with only a couple of clicks you do start to wonder why they bothered carefully drawing so many locations. The puzzles are mostly quite simple and if you get stuck you do have the option to skip them, The stacking puzzles were the least fun to play as the physics are a bit wonky and you couldn't rotate the stones but this was a minor annoyance.
By the end of the game I was starting to miss the hidden object side of the game but not to worry as completing the game unlocks a bonus chapter very light on plot and heavy on hidden objects as well as a nice game mode that allows you to find *every* object in the game.
The collectibles are well hidden and there is no freeplay option available so you do need to collect them all as you progress through the game, meaning that you will likely have to play through several times to spot them all.
All in all it's a very nicely put together game and well worth it if you like this genre or fancy something casual to play that doesn't feel cheap.