itch.io

If you are talking about the code for patrons , you can find it on the patron - https://www.patreon.com/posts/release-escape-0-26989824 (This is the only stage for patrons and I think the code can be found on the Internet without problems. )

If you wander around well, you can find a closed door and a riddle on the wall, after you solve it ( the answer is in the Walkthrough ), you will get to the next level.