An homage to a classic which is destined to become a classic in its own right.
Then there are the puzzles. No game based on DM would be complete without puzzles. Switch puzzles, pressure plate puzzles, place correct object in alcove-shelf to answer a riddle, and other puzzles abound. Many of these can be challenging, though maybe less so for someone who's played these types of games in the past, and has prior exposure to these types of puzzles. If there's any gripe I have, I do think inventory object texts and especially note texts, are way too small for my rather crappy eyesight. Other than that, the game is awesome.