You have a bug in the saving system. At least when it comes to the export. It freezes up and can give you an error when you try to export it. I would recommend that you make it to a textfield instead of a line.
Something that would be a good way to progress is a soft reset, so we can get a bonus when we start or something like that. But keep up the work otherwise
In idea for upgrades, if you can why not make some upgrades for the factory, like making faster parts or guns? a perfect way should be that it would cost exp to upgrade it like prestige.
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I am aware of this issue, it does work the 2nd time you click on it, I am working on fixing that error.