The lighting was a hard part to get work well, i still don't know if i did it correctly, but i got away with it. The sfx was as important as the light, because tell you a lot of what you cant see, and makes you anxious, because lets you know you are not alone in the dark.
Notes were important too, for me, games should always tell a story, some time they not need to (tetris, pacman, etc...), but i think they should xD.
Thanks for playing!