when you rice certain level (i dont know wich is!) the job change from factory to sweet factory.
you can only work every 6 hours, but after that time is up you can go back to the factory and click the big machine beside the worker-avatar (the one that never moves) and you sould get 200+ coins...
??? you just work there is no getting accepted
at the sweets factory on the far left hand side of the map
Which factory but anyway most factories have assembly lines
some where that makes sweets