itch.io

google winrar & use that to open games mam you have a 40 day free trail to use it & its amazing for opening games & compressing them & basically doing everything that needs to be done with them because every time you exe the unity player it copys it self again & again on to the computer unless you replace the file everytime but who wants to do that every time 

hope that helps you mam

& the icon should be a stack of books let me know if you want the link 

You need to extract all the files from the zip into an actual folder. You can do this using 7zip.