People who like mystery games that require some skill and knowledge? Not all games are just point and click "go boom" games, most of the ones that require a thought process are good.
Incorrect. Half of it is in the attic. The bottom is in the basement. Make sure you enter the secret password to get into the basement though.
The puzzle has nothing to do with chemistry, I figured it out it has to do with the tune some bitch is singing and piano scales. Even then you only get 7 random numbers.