Wonderful job on this! I really like the style and the skewed, flowing design. Makes it very interesting and visually appealing. And I love the uneven walls (thick/thin)!

Personally, I prefer the darker version in the first post. Yes, it's quite dark, but it gives it a wonderful, creepy atmosphere. And the way my monitor is calibrated, I can still see all the details perfectly fine. Maybe when it's all done, you could offer two versions...one dark and one bright.