I bought this after playing and enjoying Rhem 4. Started with Rhem 1 and it was so difficult and complicated that even using a walkthrough getting around was incredibly confusing. I'm afraid two of us gave up after a few stressful hours. The puzzles were fine but it is very,very difficult to negotiate the site. We went straight to Rhem 3 and this was much more successful. Again difficult to find your way around but not impossible. Still had to resort to a walkthrough rather a lot as some puzzles are fiendishly complex. Had to fill pages and pages with notes. The three games together are such good value as they can take hours to play. Will play Rhem 2 when my brain has recovered and hope it's better than the first one.