Aha! I'm glad to have been the first! :D
As to "completion", how would I tell...? Is it to do with the poem at the end...?
(I think that I completed it, in that I'm pretty confident that I performed it in every room--but it's hard to be sure, especially as I get turned around fairly easily!)
On which note: I could really have used a map! Even just a simple one. ^^; But I muddled through as it was!