I feel kinda cheated. I didn't find anything that really sparked my curiosity when I searched for "Upon the looking glass", so I brute forced my way in. A quick rewrite of script.js that put the ajax call in a loop found the code in no time. And since I had my rewrite in the same browser I had logged into macheist, I never even had to enter the code for real. When I went back to backdoor, it went straight to the countdown page.
Anyway, I just wanted to post that there was another way for posterity's sake. If anyone is interested in the html/js I'd be happy to send it to you. And now that I know the heists are more than just hacking websites, I'll try to find the more fun solutions in the future.
The only way to gain control is to lose everything else