The more you collect, the more trailers will be attached to your vehicle. The long track is not only an indicator of your success, but also an instrument of destruction: if you manage to position yourself correctly, your enemies will eventually crash into one of your trailers and die instantly. However, it also means you're vulnerable in the same way: try to avoid running into the side of another vehicle, or you'll have to start over.
The goal of this game is to survive as long as you can while harvesting insane amounts of wheat. Control your harvester by pressing the left, right, up and down arrows on your keyboard. If you want, you can use W, A, S and D keys. Wheat is harvested automatically, all you need to do is drive over the yellow parts of the field.