Thanks for the enjoyable experience! I love the graphics and the extensive map. Some things that would really help this game:
Map: One of the frustrating parts was repeteadly getting lost and going to places I had already been. A map would compliment the size of the area and make it less frustrating to find keys
Music: The music, epic as it was, became repetitive after about 15 minutes of maniac interaction. I know that all games loop their music when you're exploring a map, but it would help if the music you used was maybe a minute longer, so that we don't feel like we're listening to the same short track over and over again.
Brilliant job! Lots of fun! Keep up the good work!