What a fun concept and a great use of theme!
It does feel like a midnight stroll with the limited POV range and the complete darkness. The feeling you were aiming for is captured pretty well. The mechanics are also pretty simple to pick up on, but hard to master, especially when it starts to get more difficult. Sometimes a bugged ghoulie will show up while I'm working on another one and it erases progress, but it's a known issue so I won't knock it too much.
I'll agree with some of the other commenters that perhaps the ghouls and goblins are a little too colorful and/or flat considering the atmosphere, but it's a three-day project, so I am not expecting perfection. Be proud of coming up with a very good idea that is executed precisely.