My highest score (out of about two dozen tries) was only a measly 43.5 million points, which is only about a third what the highest scorers for the day were getting.

My basic strategy was to get a game where the defaul Planet 1 was in about the middle of the habitable zone, then put a dwarf star as close as I could get it to the central star, then add more Earths to increase the complexity.

What could I have done better?