Oooohh this is a few tiny tweaks away from being something really special.
The basic mechanics are fun, combining rollers and making paths is nice. The upkeep makes you think and the camera controls are nice and easy to get the hang of.
If I was to say anything, just changing some numbers around to make it more fast paced, having the starting camera so you can see the whole factory and the house. Otherwise, great stuff and nice literal use of the theme