This was an interesting idea but it really, really needed a way to move machines around after placing them. I had to remove a conveyor belt after realizing a paint sprayer couldn't fit above it far too many times. I also noticed that you weren't refunded for the cost of a machine if you deconstruct it, which seems unfair.
The game was fun aside from that, but I'm not sure if it has enough to distinguish it from other factory-style games if expanded.