The strat is to garner as many points as possible in the early stages and then survive long enough to reach the 100 turns mark to get the best title. There's a lot of luck involved but in general you should try to keep space near seaweeds for the seaweed farm and keep your constructions along the whole screen, because that will let you place scientific center at the bottom and get much more points from it. Also, stacking bunkers is only a good way to go in the early stage of the game. Good luck bros.