Space. The final junkyard. Good thing one planets trash is another planets treasure! You're captain of your own scavenging spaceship, picking up space junk and transporting it to any city that will take it. Launch your junk... uh... *cargo* out of your airlock to propel your ship! Race to deliver your cargo as you navigate the orbits of nearby planets and moons! It's astrodynamics for fun and profit!