Once the Building is ready, let's start working!

For Factories, drag the items you wish to make to the building. Remember that once you've dragged an item to the queue, you cannot cancel it. It will take some time to make, but you can speed this up by using Lightning Tickets (each ticket decreases the production time by 5 minutes). You can also unlock more slots for your Factory (up to 6 slots).

For the Energy Exchangers and Product Exchangers, drag the materials towards the building to fulfill the bars above to get the Product or Energy. Don't worry if you filled up the bar too much, the excess will be carried over to the next empty bar, and the excess of the third bar will be carried over to another empty bar later on if all bars are filled. You can use Ice Cubes to skip the cooldown time of the bars if you don't want to wait, otherwise you can wait for the timer to countdown to use it again.

For the Energy Producers, similar to Factories you can queue up products to produce. Once you collect a product from an Energy Producer, it will immediately convert into instant Energy. You can only queue two items at a time, and you cannot cancel them once you've queued them. You can speed up production by using Lightning Tickets.

For the Quest Buildings, congratulations! You can move on with the storyline.