I have a windows computer and i can't seem to get it to work. Even after I've extracted all the files it keeps saying it's missing. I've retried about 5 times with the same problem each time

It appears that it has been altered to directly download onto your PC so you can just double click and open / play it. However you may have trouble with your virus protection depending on what it is, I had it warn me that it wasn't safe but I told it to disregard and still continue and haven't had problems since.