This fits the theme really well and the random swapping mechanic creates just the right amount of chaos! I think the conveyor belts + platforms that you have to throw workers onto made for some interesting strategy where different workers are in charge of different stations. There felt like quite a bit of downtime though (e.g. the top left and top right stations in level 3) since I think it's optimal to just let that worker stay there after they throw the box down. Maybe keeping the same time limit, but increasing conveyor belt speed and upping the boxes required would make it so there's less waiting.
Also, I just realized you're the dev who made WitchWay. Our game jam entry drew inspiration from it and I really enjoyed playing through that game as well!