Fully Dilated

While on a deep space exploration mission, you and your crew encounter a hostile alien presence and must return to your base and warn everyone of the new threat.  Overcome your limited fuel supply by using the gravity of nearby asteroids and planets to slingshot you toward the stargate at the end of each level, but beware! The closer you get to these massive bodies, the more time you will lose to time dilation.  Can you make it back in time to save your comrades from what is sure to be a gruesome fate?