In an older thread I have started (
viewtopic.php?f=3&t=1745&p=17134#p17134), I have stated that "Challenge was a key factor of old games". Challenging games needs challenging puzzles, and evidently challenging puzzles means that not every one could solve them. Grimrock is an old school game, and as an old school, it is imperative that puzzles should drive some people crazy. Those who cannot stand this, can always quit and play quest-based rpgs (like skyrim, dragon age, etc). They have no puzzle, require no much brains, and everybody can finish them.