Thanks for the comment! There is a function where you can click and drag the screen, so you can move all around the backgrounds. Maybe it's not clear enough in-game that you can do this. In the next update I 'll do something to make this clearer.
But also, just after there is where the game is up to at this stage, so there's not much more to play currently from where you're encountering the bug. Are you playing on PC or Mac?
That's what I mean, I know you can move around the background, but sometimes that function just stops working entirely, regardless of whether you reload a save or close and reopen the game etc.
I figured it out. That scene didn't have the function activated. I've fixed it now and it will be with the next update. In the meantime, you should be able to resize the window to make the game screen wider so you can then exit the locker.