Interesting experience. The graphics are nice and everything fits together well. The theme and tutorial were incorporated perfectly. Not sure why everyone says it's hard though - I found it quite easy. The layouts are not too hard to memorize and when you do, you can easily traverse them without any light. Too bad it was too short - I'd love to play more of this, maybe even with monsters or traps hidden in the dark. That would really discourage you from running around blindly.
Overall, a solid game. Great job!