You know, what's interesting is that many people who played the game said the exact opposite to me. They claimed that the demo did not do the game justice at all, mostly because it was rather short and the puzzle included was not one of the good ones.
Anyways, for those of you who speak German two more reviews are online:
Adventure Spiele (4/5 stars)
Adventure Archiv (83%)
And for the handful of you who speak Greek
, this month's issue of the PC Master magazine features a review too (80%).