During the last level of Dishwasher: Vampire Smile, how do you get into the secret room?

During the last level, when they recreate foghorn cafe from the first game, the very first room has 2 ways, 1 way you can't get into. In the first game ska put their logo there as an easter egg. As i played it with my friend it even prompted us with the arrows to go through the doorway. How do/Can you get in there for yet another easter egg/prize/bead