The Frustration of Downloading a Game...

I've watched strihiryu (another YouTuber and a fellow Bro like kyokoon64!) play this game called "Ib" and I've watched watched it since the first post and have wanted to download and play it and now that is playing it, I want to play it even more!!
Problem is...I have trouble trying to extract the files...
I've become a fan if you haven't noticed my favorites file for the game, you see...The chracteres and everything are amazing! The graphics are great and the art is lovely too~
I'm trying to convert the different tracks onto iTunes through MP3 files and I've only gotten the title one down. But I really need to get the other tracks before me and my family leaves for the last trip of the summer before school starts, so I gotta get my butt in gear...

Sadly, I'll miss the first day of school with my friends on Friday due to being on that trip, and I apologize to you guys if you're reading this!! Please forgive meeeeeeeee!! I promise I'll be back on Monday!!
So yeah...I have WinRAR to extract the files, but it's complicated once the game's finished downloading (since it's doing that right now).
I've also downloaded Ao Oni 5.2 and when I've clicked "Play" some error message comes up saying something about a file not being able to upload. I'm practically dying because I can't play these games and it's driving me insane...

So I beg of anyone who's accomplished such a feat...PLEASE HELP A FELLOW GAMER!! I wanna play Ib so badly, I migt cry if after downloading, it doesn't work!! I would like help on what to do after downloading it when extracting the files and stuff...Please...