I WOULD LIKE TO NOTE: I personally have not dealt with ANY bugs regarding this game.
While I haven't finished the game yet (ignore the 43.6 hours played - my fault for leaving the game running over night, so far I've played maybe 10-15 hours), I wanted to throw in my two cents before the end of the Holiday Sale. Personally I think the $1.99 is a steal.
Basic point and click game where you move back and forth between areas of the abbey finding objects and utilizing them to achieve results. The main character, Leonardo, is very similar to the Sherlock Holmes persona in his deductive reasoning methods, logic, and personality, but in this case he is a monk with a... let's say "naïve" boy for a side-kick. So far, with a few exceptions, the puzzles mostly involve finding hidden objects and using those objects to overcome obstacles.
I really enjoyed that almost all of the object locations/ solutions to problems involved basic logic - when a solution I tried didn't work, I was almost always VERY close to the actual solution. Most likely, what you think will be on the right track, you'll just have to push your thinking a little bit further.
The controls took me a moment to figure out but are basic and make moving through the different areas smooth. The art is an interesting mix of 3D and 2D (but strongly reminds me of cartoons I watched in the 90's). In terms of finding the hidden objects - I will admit to using a guide in several spots, but frankly, if you think you are in the right location to find something, you probably are - you really do have to pay attention to your environment to keep from missing the little details. Also, just a tip: keep your sidekick in mind. He's not the brightest crayon, but he's not just a decorative purse-puppy either.
That being said, I must disagree with some of the negative comments. I know nothing of the original story this game is based off of, but coming from a religious background and some experience in medieval history, I would say to keep in mind that: 1) this is a fictional (as far as I'm aware anyway) story - the characters are very blunt/cliché personalities, as is very common in kids' stories. 2) There are a lot of unsavory religious figures/beliefs throughout history that this does mirror. No, as far as I've seen it does not emphasize any inspiring religious feats, but I don't believe that this game was intended to to supplement the player's religious beliefs - it is through and through, a STORY of murder, greed, and corruption. I actually enjoyed many of the historical references and believe the creators did a fair share of research regarding the content.
The voice acting is well done and while the animations are fairly basic, they are placed to make the story feel like genuine interactions and the camera angles top off the whole "movie vibe." The premise of the story is common enough but the environment is unique and characters are fun to interact with. As it's my first playthrough I can't say much for how your responses the conversations impact the story- you do get to question characters and choose your responses, but I've noticed in several conversations that Leonardo will address all of your "optional" responses at some point, despite which selections you choose.
While it probably does deserve the whole $19.99, I am a cheapskate and probably wouldn't recommend spending more than $8.