How to play html5 game offline?

I wanted to save some html5 games on the laptop for my little brother to play when he's out of wifi range. I downloaded all the files and changed the paths so that no erros appear. Now when I open index.html a blank page oppen with a loader gif and nothing else loads. I dont understand why? No errors are thrown. The only error is the one that it cannot find ads (when loadvoyager is called). I tried to comment it, still nothing positively happends. This is an archive of the game: http://ift.tt/1JfpT4e

Thank you!