It took me quite some time before I noticed a subtle cue on two paintings - one with three distinctively shaded containers and the other had the pattern scheme. YAY! Then, I travelled through a secret passage and weighed some items. I liked the four-digit door puzzle which required some logic and patience to do it. :D
I was stuck at two points. First, I didn't know which liquid and how much I should use to fill in a wine glass although I had put two items on top of it. Second, I didn't know where to use a palette. Thanks to the walk through, I wouldn't have escaped with it.
Painting was fun and highly relevant to the game.