Presumably you are using the app, which last time I checked couldn't support .rar files because it's a proprietary format. You can download and unpack the game manually from the site, which is inconvenient but should work. While you're at it, please petition the creator to repackage their game as a .zip file. :)
Thank you for responding. I actually was on the website but whenever i tried to download a .rar file it would bring this up. It would open it with realplayer, instead of Windows explorer like it normally would if it was a .zip file, I don't know why. Any help is appreciated.
Oh! In that case, pull down the list and see if WinRAR is in it. If not, select Save File instead, save the archive to disk and try from there; Windows Explorer should be able to suggest more options.
Wait, you do have WinRAR installed, right? You need it to open a .rar archive.
It would open it with realplayer, instead of Windows explorer like it normally would if it was a .zip file, I don't know why. Any help is appreciated.