Great idea and setup, the idea of not wanting to be rude / disturbing the Feierabend feels like a very german thing ;)
It might be intentional, but I after only messing up a few shelves in the beginning I could not recover from that for almost the whole level. Some areas with less shelves might be nice to give the player some more (perceived) agency. Which doesn't mean I would cause any less chaos, I'm really a really bad elefant in terms of driving.