i don't think this was made for the jam. it's way too polished for a 4 day game and it was submitted in the first 2 minutes of this jam. i don't think it's possible to make this is 2 minutes. EDIT: it was made during the jam, look at the replies.
The page was added to the jam as soon as possible - it was empty at the time and has been consistently updated throughout :) I (theChief) am a moderator in the discord server, you can see regular progress screenshots there if you still don't believe me 😉
Idk about theChief but I'm more than happy to show some screenshots of all of the git commits and WIP mockups, if that clears anything up for anyone :) We were posting our progress throughout the jam in the discord!