So the green crystal is a button which rises a platform holding a Giger-like alien in stasus (I guess). Then the Deacon activates one of the eggs and it ends with it and a facehugger staring at each other. I gather this is a different room to the one in the movie, perhaps one of the other silo's?
I twas cool to watch, really good effort, but I don't know what's going on in it.