Graphics is okay although not pleasing. It's hard to navigate around without a map. I should have created a route map on a piece of paper like I did for the first episode.
Thanks to the walk through, I couldn't find the last wooden peg which is on top of the main door. Pff... Then, I kind of lost my way and did't find the door to use the first old key. After I got a silver key for the security panel, things went smooth because puzzles are easy to solve.