Good one!
Visually it looks good and I had fun playing the gameplay loop. It feels like it's just missing a little bit more to become a full coop game. When I started the game I wasn't really sure what I was supposed to do or achieve, so I think it's missing an ingame tutorial or even just signals to the player what they should do. It took me a really long time to realise I had to put the bags in the machine to scan them. I also didn't know how to make the cart send, or what my actual goal was? number of bags sent? bags per trolley?
Having said that, I think if the game was added to, (I like the incinerator idea another commenter had), clearer goals and tutorials, plus a little more chaos, I could see people wanting to play something like this with their friends.