After finishing this wonderfully quirky game, I noticed in the bonus section off the main menu that there's a brief glimpse on the table when looking at the snapshots from the crew (reference pics of area). Anyone figure this part out? I'm missing the one trading card so not sure if there's a connection to the mystery door or if that's from getting all the cards in the game.  
 
Plus I loved turning on the jukebox & going back to watching the deer jamming on the wall.

The stuff on the note are hints on how to unlock Card 65. They describe a set of menu selections to make in a certain order...