Poll - was this puzzle too difficult?

Of all the feedback about the demo, one thing has kept coming up - the puzzle about finding the iron ring to help get past the hand scanner seemed to baffle people.  We're already going to put in an extra hint or two in the full game to help people with this, but what did you think - was this puzzle too hard?  

Voting on the top right of the blog until the end of September.

Haven't played the demo yet?  Download it here.