Thank you so much. Regarding the lighthouse, it was intentional; the interior is darker because I wanted the light to guide you. I apologize for the overly dark experience ;) Would you like me to brighten it up a bit?
I think it's due to my "filter" for the atmosphere. I'm using a sprite of a certain color with low opacity that covers the entire screen to give that atmospheric effect. This must be affecting the depth of the shadows. Thanks for the feedback.