Re: クロノスフィアー [Chronos Fear]
Reading through comments on the authors blog, I found a couple things.
First and most importantly for you people having trouble with the archive being corrupted, its a known issue and he's uploaded a fixed version. He didn't change the link in the main post though, so you'll have to do some digging to find it.
He also mentions the corrupt file isn't actually used in the current version, so if you can get around it on your own (7z did it fine for me) then you don't need to worry about it.
Lastly, there's a known bug with the little purple guys (Ego Devils, for those in the know) where after they attack you a certain number of times, they...stop. This will be fixed with the next version, whenever that is.
Also yes, for the whole name debate, the official name is Chronos Fear.