Greenie here. I gave you a password in the video you found this from. This is where you enter it. You will be led to an obby from there.
Throughout all of the ciphers, research puzzles, and stupidly long levels, you stuck through to the end of it all. Thank you for devoting your time to this puzzle. You and many others are the reason why I bothered to develop this riddle in the first place.
Check the source code to apply for the hall of winners. You need some kind of reward, after all.