Collect resources from connected planets on a lightspeed rail system while paying the toll to the stations orbiting those planets. Fail to pay the required toll and lose (in this build, the game will just quit). 

Click the circular arrow icons to change the direction of the rail system. 

Crammed this entry on Monday, so there may be unbeatable/super-easy situations but I wanted to submit anyway

Entry: http://www.ludumdare.com/compo/ludum-dare-30/?action=preview&uid=1121