If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
You must reach the next factory in order to progress, collect the goods from each factory and see if you can get them to the next factory, meeting the demands. From boxes, to logs, to tires, to basketballs, your journey is only just beginning.
Arrow Keys - Drive the train.
Spacbear - Boost.
Mouse - Control the crane.