I really went overboard on this one, after saying I wouldn't this time. Honestly, I feel TWAT was a stronger entry; Beach Defend 2000 doesn't have the jank and bizarreness of TWAT. Beach Defend 2000 started off as "Beachhead 2000 with microtransactions" and then I just started throwing stuff in when I realized that wasn't really working.
Also, like I said, I spent way too long on it. I pretty much spent the entire week on this project.
I tested the CD music functionality with Sabaton's The Great War- of the four physical CDs I own, it was the best fit. I think it would also sync up well to Carolus Rex, Will To Power (Arch Enemy) Dark Passion Play (Nightwish), or Imaginaerum (Nightwish). Only one of those really makes sense; the others are just ones I was listening to with tracks arranged in the right order (though I don't know if physical copies are arranged differently).