Made in about 10 hours. Entered into jam just in case I broke a Compo rule. Used Unity, Blender, GIMP, and Audacity.
You are a space plane commander flying your ship through space from planet to planet, dropping off passengers as you go. Fly through all 5 planets to win. Connect worlds by taking people from one planet to the next, but be careful of asteroids, and watch your flight path, make sure you don't drift off.