Hmmm...I'm unfortunately not familiar with Linux stuff myself, unfortunately...I can do a bit more research and get back to you if I can. I'm so sorry for the inconvenience. I appreciate the interest in my game, though!
Okay, if you haven't figured it out yet, apparently what you need to do is do what you would do for a zip file on a PC - hover over the folder and extract the files from the .tar folder. Like I said, I'm not too familiar with linux, and I can't test it myself. But I really do hope you can get it to work!