Take out the enemy offensive space cannon by guiding a rocket through planetary formations. The planetary formations and its gravity will knock the rocket off its course so you must utilize the planets gravity and projectile physics to your own advantage.
The planets gravity will pull the rockets subtlety in which leads to looping of the rockets around the planet or planets. So through trial and error you can obtain a very sweet shot that leads to the enemy station. You can also utilize a lever to decide how much velocity is needed on precision shots. When a rocket is fired you can see a trail that the rocket creates which is a helpful indicator on how to adjust the aim and the velocity for the next shot.