I accidentally clicked through the explanatory text after the first slide (I was still clicking the pump and didn't realize one more click was going to skip through); I have not been able to get the applet to rewind back to the beginning.

If you hard reset, it will erase your save file cookie and forget your progress. Another option, if you push through to the end and deliver your first product, you unlock the refinery map feature and can jump back to the extraction step!