This was interesting enough to play through (in 4:19). I could see this becoming something good. One possible direction is to look at those "spot the spooky hidden differences" games like "Exit 8" or "The Cabin Factory", with the new twist that you aren't just a passive observer but able to fix stuff, visibly clearing gloomy fog and dispelling monsters.
One bug: I'm not sure if it's just my hardware, but I seemed to keep gradually rotating right.