Ok, since it's an RPG game you are supposed to go here and there looking for stuff, and people will always ask to find some crazy item. Fair enough for a while, but after that it becomes a bit excessive. 4/5
I found a visual bug: when you have found the "lost" ID card and you return to the restaurant, if you go elsewhere and return, the card won't be in its place anymore. As for the game 4/5 - a bit boring waiting for Mr. Detective to move all the time.
Playing "Pro Mode" once you've already finished the standard game will make your game much smoother (and easier). I assume it's possible to complete the "hardest" level in 15 minutes... personally it took me 16:34:540 with an ending score of 36,060 points. Not bad.
Overall great game, awesome music too. 5/5
Please report bugs through the ticket system. http://www.kongregate.com/forums/12051-crusaders-of-the-lost-idols/topics/722364-how-to-report-a-bug