Thanks. I've played the demo of your project. Very slick. Looks promising. The topic doesn't give much away though - do you want to PM me the outline of your story so we can see if we could avoid any similarities? Not that I'm worried about copying, but it might be good for both of us to know we're taking the whole 'sleeping' theme in different directions...
As for the sprites, there are actually very few custom graphics in the demo itself - couple of subtle edits, but nothing I would claim as mine. So just the items icons, I think... All the custom stuff is under wraps for now.
Thanks. I don't really have anything more than you. Maybe a few more things, but the room is just the view size.
The outline of my story is extremely vague as of now, but I'll see if I can clean it up and PM it to you soon. I was going to have it where you can enter people'ss dreams, but not only nightmares. For example, each dream might be a different area to explore, and nightmares would typically be only dungeons. But, you'd have to explore each dream quickly, for if the person wakes up and you're still in the dream, it's a game over. And, you can't start exploring dreams until you get a certain item, of which I'm not quite sure I want it to be yet. But, I'm planning to make the whole idea complex, for example, there are dreams inside of dreams.
As for your custom sprites, I know that there weren't really any in this demo, but from seeing screenshots, and that banner in your sig (which honestly looks like it was made by Nintendo - really, it looks like it were made by Nintendo's artists, not exaggerating at all) - really gives the impression you are a fantastic artist. Who knows, maybe someday we'll be able to collaborate.
I personally like the bluer tiles for nighttime, and it shouldn't be hard to do it. All you have to do is draw a translucent rectangle on the screen to show it getting darker, and then when it becomes actual night, you can just replace the morning background with the night background tiles, as long as they are organized the same way in the background resource.
Good luck. It'll definitely be interesting to see how this develops. You seem devoted and one of the few intelligent users of Game Maker here, so I have faith that what you want done you can pull off. Keep it up, don't quit, and keep makin' me happy, lol.