Can I complete the ending without a straight tower?

I completed the last level before the ending in Stephen's Sausage Roll without making the tower completely straight, but still with a ladder all the way up. But now a can't get the sausage at the top down. I can see how to do it with 2 ladders, but not like this. The problem is I quit the game after that level, and now I can't undo to change the tower.

Is there a way to complete this, or is it impossible to complete the game now?