https://www.johnayliff.com/games/seedship/index.html?bmmorwj...
https://www.johnayliff.com/games/seedship/index.html?mlhorgj...
Better atmosphere, temperature, and water in the above run could add another 1k, so it seems that the maximum is at least 13k, though I suspect it is higher.
I guess my score was like ~7k, but I did end up with a civilization of highly enlightened Neolithic cave-people.
The sequel "Beyond the Chiron Gate" adds more complexity to the formula, but is still fundamentally a similar game.