In the second room there is flyers that have this Text: "One for All, all for one" the "One" and "All" are written in red and the "all for one" also is in red so !!! the key is 1111 all one
and this game is just a try also do you think that these games in this jam are really tested it's a friend and foamily voting stuff it's not a real Jam, I just subscribed to challenge my self what can I do in just one week, also i worked on an AI like for 3 days but i removed because it wasn't good enough. anyway good luck.
PS: Depend on your IQ ;)
You never know who would test released prototype, either a bigger studios looking for ideas or potential new partners interested in your project who could give a hand.
Nevertheless, good luck for the game dev if continuing.