I think “satanic” is being used in an adverbial sense, rather than as an adjective. By this, I mean that worship that is satanic in manner, which in this sense, means not Christian. By contrast, satanic (adj) worship would be something that actively involves worship of Satan or Satanism.

That being said, I’m probably thinking about this more than he did.

It’s a term from gaming which, in the broadest sense, means how they paint the sky to make it look authentic. Imagine being inside a cardboard box - the sides are painted to look like rolling mountains and hills, and the top face is painted to look like a cloudy sky, and if it’s done well, all of these should connect up and give the impression that you’re lookint at a real sky.

We’ll just be very disappointed in you.

There’s a reason the UK has the “Oy mate, have you got a loisence for that loisence?” joke. (“Loisence” meaning “license”, but pronounced funny)