itch.io

So, this software is not registered with windows and runs independently of windows registry?

Because I don't see any install files in the unzipped folder.

Edit:  As mentioned elsewhere,  I ran the software as administrator. It took a long time to load (I have an old computer). But it worked. And now it runs fine except a little laggy because of my old cpu and gpu.

I downloaded the Windows 1.2 version. It's a zipped file. I unzipped. 

How do I install the program?  

clicking the executable gives me a missing Unity player message.