Interesting idea to make the jam even more challenging, by not communicating with each other at the beginning and all working individually on your submission.
The setting of the game has become very unique, you don't see a haloween ghost party in space that often.
You have also implemented the topic in a very interesting way. However the controls on the plates were a bit clunky. Unfortunately, i didn't quite understand what exactly i had to do and stopped playing at some point where i couldn't get a door open.
All in all i think this is a pretty solid submission. Great job and respect for the additional challenge.