Possible to edit a downloaded rar file game?

I downloaded a very small match 3 game (yeah, sissy stuff). All games I get are rar files so I know all about opening them. I use 7-zip. I also know I can open the file in wordpad. Unfortunately, when I do that, it is gibberish. There are a few things about this game that I would like to see if I can edit in that rar file. A couple of things just make it extremely annoying. Are these downloaded files mostly password protected? Is there a way to open it in wordpad so I can actually read it? I'm bored and these games help pass the time. I realize I may be just dreaming here but, any input is very much appreciated!

Thanks for the reply,
After I download, I put the rar in a new folder on my desktop. I (un)rar it in that same folder and just have an exe and the rar file. I don't archive anything if that makes a difference. What I want to do is open the rar file in WordPad or whatever so I can see if it is editable. I can open it but, it is all in hieroglyphics.