For some reason, the files wouldn't play through my cell phone as I usually like to listen to these in my car but from I could tell through my tiny laptop speakers excellent work William!
Each track puts you in the mind of the classic B rate horror and sci fi movies of the time period reminding us that the music was always better than the movie which is amazing because they had such a short post-production schedule with crushing deadlines. It wasn't enough to just be a good composer you had to be resourceful too.
I think "Giants of Titan" is my favorite. From what I understand, the theremin was, and still is, a very difficult instrument to master and you use it sparingly which is exactly how they would have used it back then because... well, it's a bloody damn hard instrument to play!
Also, to me, the themes for most of the tracks are simple reminding us of a simpler time which is so refreshing. I grew up in the 70's and 80's but I remember sneaking up late at night to watch TV and sometimes these movies would come on some Late, Late Show Double Feature. They were low-budget and cheesy but still a lot of fun to watch. So your music brings me back to a simpler time even though it was a time before mine.
All in all really nice work and I wish I were half the orchestrator you are.