Well Fat Princess is at last going to grant you that right, as a part of new DLC announced at PAX. According to the developers, "New Pork offers an exciting array of strategies to slice and dice your way to victory. Use multiple sewer shortcuts to sneak up behind your enemies, blow up barricades to open up new routes of assault and defend your princess from the rooftops."
Apparently there are more Fat Princess related announcements to come. We're looking forward to it.