This tutorial will equip you with the basics on how to play the Gravitational Racing scenarios.
An important thing to note that hasn't been shown in this tutorial is what the radial vision fully represents: Distance to a celestial matters a lot, so being a few metres away can make a big difference to the force.
Another thing to mention is that your car will be automatically reset (3s delay) if you hit a moving object.

For those who are interested in realism, you may want to read the following, overwise ignore it: