No challenge. Clicking until the end of time.
Art is good)
And while I played, I got an idea: mix it with "wolf-goat-cabbage". You get some items: ABCD. Planets 1 and 2 need A and B. But if you deliver A to planet 1, something catastrophic will happen. And you have no enough fuel to deliver A to planet 2. So you have to deliver C to planet 6 first) Something like this)