itch.io

I'm not really sure what I am doing trying to set this game up. It shows as a Rar file, and for some reason doesn't do anything when i try to activate or run it. I'm trying to launch it via Java but my computer is a pain in the ass so I have to figure out java all over again. Is that the right route? or should I be trying to get it going another way. I'm not seeing a whole lot of answers on the forums here either.