Beautiful game, I loved everything about it, the atmosphere is really pleasing to me.
I only got some trouble phasing through walls or going to places I weren't supposed to and got stuck a few times.
Being able to zoom out the map and have just the borders instead of a full rectangle to indicate the current room would have been nice, but I'm probably just nitpicking here.
But it's very good, and the spritework/colors are really nicely done.