This is a cool idea! Very impressive to see a complex game like this created in just 48 hours.
I didn't play for too long, but I've definitely gotten absorbed in games like this before. If you plan to keep developing it, I personally think that a good area of focus might be on juice, as in the overall 'feel'.
It seems like the core loop is incrementing the resource counters, so that should be fun and engaging in and of itself. Simple animations while the machines are working, maybe seeing the resources bloop from place to place along the connector lines, maybe some interim milestones to build cool stuff the player will want -- no doubt you've got loads of ideas anyway. Those things all take time, of course, so I understand why they wouldn't make it into the jam build.
Anyway, this was super interesting. Thanks for letting me play it. All the best!