Its important to read manuals and clue books, full playability start when you understand interface. Download them from here: http://www.replacementdocs.com/news.php BTW here is probably every manuals from classic games!
Game download from Abandonware Paradise, or many other places.
Also visit this very good walkthrough: http://www.sircabirus.com/uw1walk/pages/index.html
This game is very, very original, (nothing similar exist) so when meet first time you may feel it too strange and dificulty, but later after play you may understand its genius.

