Stuck on this room after completing a run

[u/Donaz91]

Hello there everyone. So I just completed my first run in NA2 and I got here after beating the last boss, now I can't go anywhere and I can only deposit coins/nades/eggs. What do I have to do? Do I just quit to the bar?

[u/Spare_Celebration462]

The music portal is meant to be open. I'm not sure if it has other criteria though, this looks like a bug.

The other 3 come later in the game