Thank you denDwaler and janaba, I've got it working! Now to explore
edited: aaaand - it's amazing! Well done, denDwaler. I love the stained glass everywhere, and the beautiful objects and decorations. The music too. I've unlocked the credits and may I also say congratulations to all those who helped - including those sly beta testers who didn't tell us what they were up to!
I still have more of the puzzles to solve, but it's good to have more to do!