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Yeah, there's a lot of stuff that could be made to feel better with a bit of tweaking. I was more worried about getting just stuff working at all, pretty much right at the limit of what I could do in a week alone. 

I specifically didn't want to do like a "dual-gameplay" thing, because I assumed that's everyone's first thought. So the theme connection is more in the story/theme - The phrase is often used to describe how celestial bodies affect that which happens on Earth, so the massive "evil" eclipse in the sky above is causing evil things to happen and undead to come to life.  As well as referring to your existence both in life and in death being similar, all these zombies and also the samurai were warriors when they were alive and even now after they've died, they must still fight.