Played about 15 mins, its okay very intuitive but also pretty plain you can imagine with dozens of new recipes and types of alloys would make it bigger scale but not necessarily more interesting.
I think maybe setting up a production goal would be a good idea, a scenario such as you get a contract and have to build a system producing say hourly x,y,z alloys of kinds and when you hitting the target, the game calculate your profit and give you a rating something. Then further on you make money and expand your industry bigger, buy more advanced automations do more high end jobs.
Also it could be you having some manufacturing waste you can recycle say building a recycling center or just a place to put them and send them out to those type of service. I think realistically a highly automated fabrication or manufacturing system doesn't necessarily has to be 'absolutely no man involved', you can have some minor workers running forklifts something(obviously it would cost money and consequences)
Following are some hard issue.
-- Long screen rolling doesn't feel good, the actual system should be locked in place.
-- Conveyor path making is very painful and ugly, lots of extra clicking and re-selecting.